(in the Runtime DFT... category) is the Fourier magnitude of a quantity in a frequency band, evaluated as a square root of the quantity power in a frequency band, see Runtime Discrete Fourier Transformation.

(in the Runtime DFT... category) is the Fourier magnitude of a quantity for a frequency.

(in the Runtime DFT... category) is the Fourier phase of a quantity for a frequency. It is computed in radians in the range [-π, π].

(in the Mesh... category) is the absolute value of the Angular Coordinate defined above.

(in the Mesh... category) is the dimensional coordinate in the spanwise direction, from casing to hub. Its unit quantity is length.

(in the Mesh... category) is the dimensional coordinate in the spanwise direction, from hub to casing. Its unit quantity is length.

(in the Mesh... category) is the dimensional coordinate that follows the flow path from inlet to outlet. Its unit quantity is length.

(in the Mesh... category) is the dimensional coordinate in the circumferential (pitchwise) direction. Its unit quantity is angle.

(in the Pressure... category) is equal to the operating pressure plus the gauge pressure. See Operating Pressure for details. Its unit quantity is pressure.

(in the Wall Fluxes... category) is the amount of radiative heat flux absorbed by a semi-transparent wall for a particular band of radiation. Its unit quantity is heat-flux.

(in the Wall Fluxes... category) is the amount of solar heat flux absorbed by a semi-transparent wall or porous jump boundary for a visible or infrared (IR) radiation.

(in the Radiation... category) is the property of a medium that describes the amount of absorption of thermal radiation per unit path length within the medium. It can be interpreted as the inverse of the mean free path that a photon will travel before being absorbed (if the absorption coefficient does not vary along the path). For multi-band cases, Fluent uses the emissivity weighting factor for each band to output a weighted absorption coefficient.

The unit quantity for Absorption Coefficient is length-inverse.

(in the Mesh... category) is the accumulated displacement of the wall surface due to erosion over time. This variable will appear in the Mesh... category only for erosion dynamic mesh simulations. See Procedure for the Erosion Coupled with Dynamic Mesh Setup and Solution for more information.

(in the Steady | Unsteady DPM Statistics... category)

(in the Steady | Unsteady DPM Statistics... category)

(in the Properties... category) is the mixture acentric factor. This property is available when a composition dependent option is selected for acentric factor in the cases with Aungier-Redlich-Kwong real gas model and species transport.

(in the Acoustics... category) is the acoustic power per unit volume generated by isotropic turbulence (see Equation 11–16 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used. Its unit quantity is power per volume.

(in the Acoustics... category) is the acoustic power per unit volume generated by isotropic turbulence and reported in dB (see Equation 11–19 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used.

(in the Cell Info... category) is an integer identifier designating the partition to which a particular cell belongs. In problems in which the mesh is divided into multiple partitions to be solved on multiple processors using the parallel version of Ansys Fluent, the partition ID can be used to determine the extent of the various groups of cells. The active cell partition is used for the current calculation, while the stored cell partition (the last partition performed) is used when you save a case file. See Partitioning the Mesh Manually and Balancing the Load for more information.

(in the Premixed Combustion... category) is the adiabatic temperature of burnt products in a laminar premixed flame ( in Equation 8–100 in the Theory Guide). Its unit quantity is temperature.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this is the residual of the adjoint continuity equation in each cell.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this field is available for users using the adjoint diagnosis and is the residual of the adjoint energy equation in each cell.

(in the Sensitivities... category), This field is available after performing gradient-based turbulence model optimization within the Gradient-Based Optimizer and is the optimized blending function (), which is used to deactivate GEKO parameters inside boundary layers..

(in the Sensitivities... category), This field is available after performing Offline training of the neural network turbulence model within the Optimizer Design Variables dialog box, and is the trained blending function parameter ().

(in the Sensitivities... category), This field is available after performing gradient-based turbulence model optimization within the Gradient-Based Optimizer and is the optimized parameter, which is used to optimize strength of mixing in free shear flows.

(in the Sensitivities... category), This field is available after performing Offline training of the neural network turbulence model within the Optimizer Design Variables dialog box, and is the trained parameter.

(in the Sensitivities... category), This field is available after performing gradient-based turbulence model optimization within the Gradient-Based Optimizer and is the optimized parameter, which is used to optimize flow in non-equilibrium near wall regions (such as heat transfer or ).

(in the Sensitivities... category), This field is available after performing Offline training of the neural network turbulence model within the Optimizer Design Variables dialog box, and is the trained parameter.

(in the Sensitivities... category), This field is available after performing gradient-based turbulence model optimization within the Gradient-Based Optimizer and is the optimized parameter, which is used to optimize flow separation from smooth surfaces.

(in the Sensitivities... category), This field is available after performing Offline training of the neural network turbulence model within the Optimizer Design Variables dialog box, and is the trained parameter.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this is the residual of the adjoint local flow rate equation in each cell.

(in the Sensitivities... category), intended for expert users, can be plotted to identify those portions of the flow domain where the stabilized adjoint solution advancement scheme is applied. It is preferable to plot this with the Node Values disabled in the Contours dialog box. In this case, the Adjoint Local Solution Marker will take a value between 0 and 1. The Mode Amplitude Cutoff defined through the adjoint/controls/stabilization text command defines the lower bound for cells where the stabilized scheme is applied.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this field is available for users using the adjoint diagnosis and is the residual of the adjoint turbulent kinetic energy equation in each cell.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, This field is available for users using the adjoint diagnosis and is the residual of the adjoint specific dissipation rate in each cell.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this is the x-component of the residual of the adjoint momentum equation in each cell.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this is the y-component of the residual of the adjoint momentum equation in each cell.

(in the Sensitivities... category), intended for users using the adjoint diagnosis, this is the z-component of the residual of the adjoint momentum equation in each cell.

(in the Mesh... category) is the angle between the radial vector and the position vector. The radial vector is obtained by transforming the default radial vector (y-axis) by the same rotation that was applied to the default axial vector (z-axis). This assumes that, after the transformation, the default axial vector (z-axis) becomes the reference axis. The angle is positive in the direction of cross-product between reference axis and radial vector.

(in the Sensitivities... category) is available when the adjoint dissipation stabilization scheme is enabled and shows the location and amount of the nonlinear damping that has been introduced to damp the growth of instabilities that lead to adjoint solution divergence.

(in the Mesh... category) is a measure of the stretching of a cell. It is computed as the ratio of the maximum value to the minimum value of any of the following distances: the normal distances between the cell centroid and face centroids (computed as a dot product of the distance vector and the face normal), and the distances between the cell centroid and nodes.

(In the Soot… category) is an average number of primary particles in a soot aggregate ( in equation Equation 9–176 in the Fluent Theory Guide). This quantity is available only with the Method of Moments model.

(in the Mesh... category) is the distance from the origin in the axial direction. The axis origin and (in 3D) direction is defined for each cell zone in the Fluid Dialog Box or Solid Dialog Box. The axial direction for a 2D model is always the direction, and the axial direction for a 2D axisymmetric model is always the direction. The unit quantity for Axial Coordinate is length.

(in the Solidification/Melting... category) is the axial-direction component of the pull velocity for the solid material in a continuous casting process. Its unit quantity is velocity.

(in the Velocity... category) is the component of velocity in the axial direction. (See Velocity Reporting Options for details.) For multiphase models, this value corresponds to the selected phase in the Phase drop-down list. Its unit quantity is velocity.

(in the Wall Fluxes... category) is the axial component of the force per unit area acting tangential to the surface due to friction. Its unit quantity is that of pressure.

(in the Derivatives... category) is the non-dimensional boundedness strength of the bounded central differencing scheme, see Bounded Central Differencing Scheme in the Fluent Theory Guide.

(in the Wall Fluxes... category) is specified as an incident heat flux () for each wavelength band.

(in the Turbulence... category) is the blending function for the GEKO model.

(in the Mesh... category) is an integer that indicates the approximate number of cells from a boundary zone.

(in the Mesh... category) identifies boundary layer cells, that is, the prismatic cells in layers that are adjacent to a boundary zone (not including periodic zones or shells). Prismatic cells are hexahedral cells or wedge or polyhedral cells that have the same number of nodes on the top and bottom faces relative to the direction that is normal to the boundary. Boundary layer cells have a value of 1, whereas all other cells have a value of 0. Only cell values are useful when displaying this identifier, so you should ensure that the Node Values option is disabled in the Contours dialog box.

(in the Mesh... category) is the distance of the cell centroid from the closest boundary zone.

(in the Mesh... category) is the cell volume distribution based on the Boundary Volume, Growth Factor, and normal distance from the selected Boundary Zones defined in the Boundary cell register.

(in the Phase Interaction... category) is the bubble area fraction of the boiling model ( in Equation 14–510 and Equation 14–511 in the Fluent Theory Guide). This item is available for the Eulerian multiphase boiling model only.

(in the Phase Interaction... category) is the bubble departure diameter of the boiling model ( in Equation 14–518 through Equation 14–520 in the Fluent Theory Guide). This item is available for the Eulerian multiphase boiling model only.

(in the Phase Interaction... category) is the bubble departure frequency of the boiling model ( in Equation 14–514 in the Fluent Theory Guide). This item is available for the Eulerian multiphase boiling model only.

(in the Phase Interaction... category) is the bubble nucleation site density of the boiling model (see Equation 14–515 in the Fluent Theory Guide). This item is available for the Eulerian multiphase boiling model only.

(in the Phase Interaction... category) is the bubble waiting time of the boiling model defined as:

where is a coefficient to correct the waiting time between departures of consecutive bubbles, and is the bubble departure frequency.

This item is available for the Eulerian multiphase boiling model only.

(in the Turbulence... category) is the built-in correlation for the Blending Function for GEKO. It may be used for defining the effective Blending Function for GEKO as an expression referring to the value of the built-in correlation.

(in the Pressure... category) is the capillary pressure acting on a wetting (secondary) phase in a multiphase flow through a porous zone. Note that, although this item is available for both non-wetting and wetting phases, meaningful values are reported only for the wetting phase. See Specifying the Capillary Pressure for details.

(in the Velocity... category) is a ratio of the time step size to the acoustic wave propagation time based on the cell size.

(in the Velocity... category) is a ratio of the time step size to the convective wave propagation time based on the cell size.

(in the Cell Info... category) is the integer cell element type identification number. Each cell can have one of the following element types:

  triangle     1
  tetrahedron  2
  quadrilateral 3
  hexahedron   4
  pyramid    5
  wedge      6 
  polyhedra  7 

(in the Mesh... category) is a nondimensional parameter calculated using the normalized angle deviation method, and is defined as

(42–1)

A value of 0 indicates a best case equiangular cell, and a value of 1 indicates a completely degenerate cell. Degenerate cells (slivers) are characterized by nodes that are nearly coplanar (collinear in 2D). Cell Equiangle Skew applies to all elements.

(in the Mesh... category) is a nondimensional parameter calculated using the volume deviation method, and is defined as

(42–2)

where optimal-cell-size is the size of an equilateral cell with the same circumradius. A value of 0 indicates a best case equilateral cell and a value of 1 indicates a completely degenerate cell. Degenerate cells (slivers) are characterized by nodes that are nearly coplanar (collinear in 2D). Cell Equivolume Skew applies only to triangular and tetrahedral elements.

(in the Cell Info... category) is a unique integer identifier associated with each cell.

includes quantities that identify the cell and its relationship to other cells.

(in the Mesh... category) is an integer that indicates the number of times a cell has been subdivided by the adaption process, compared with the original mesh. For example, if one quad cell is split into four quads, the Cell Refine Level for each of the four new quads will be 1. If the resulting four quads are split again, the Cell Refine Level for each of the resulting 16 quads will be 2. This value is only available at the cell center and is only exported at the cell center when exported to Common Fluids Format - Post.

(in the Velocity... category) is the value of the Reynolds number in a cell. (Reynolds number is a dimensionless parameter that is the ratio of inertia forces to viscous forces.) Cell Reynolds Number is defined as

(42–3)

where is density, is velocity magnitude, is the effective viscosity (laminar plus turbulent), and is Cell Volume for 2D cases and Cell Volume in 3D or axisymmetric cases.

(in the Mesh... category) is the total surface area of the cell, and is computed by summing the area of the faces that compose the cell. This value is only available at the cell center and is only exported at the cell center when exported to Common Fluids Format - Post.

(in the Mesh... category) is the volume of a cell. In 2D the volume is the area of the cell multiplied by the unit depth. For axisymmetric cases, the cell volume is calculated using a reference depth of 1 radian. The unit quantity of Cell Volume is volume.

(in the Mesh... category) is the change of a cell volume over time.

(in the Mesh... category) is the cell volume over the unsteady cell volume.

(in the Mesh... category) is the two-dimensional volume of a cell in an axisymmetric computation. For an axisymmetric computation, the 2D cell volume is scaled by the radius. Its unit quantity is area.

(in the Mesh... category) is the maximum volume ratio of the current cell and its neighbors.

(in the Mesh... category) is the distribution of the normal distance of each cell centroid from the wall boundaries. Its unit quantity is length. By default, it is calculated using an exact geometric method. You have the option to specify that it is instead calculated using a Laplacian approach that estimates the value based on the transport equation; this can be useful if your case requires too much memory with the geometric wall distance method. Note that the transport equation method is not recommended for coarse meshes, since it may produce inaccurate wall distance results and subsequently decrease the accuracy of the solutions. To use the transport equation method, enter the following text command prior to running the calculation: mesh/wall-distance-method transport-eqn.

(in the Mesh... category) is the square root of the ratio of the distance between the cell centroid and cell circumcenter and the circumcenter radius:

(42–4)

This value is only available at the cell center and is only exported at the cell center when exported to Common Fluids Format - Post.

(in the Cell Info... category) is the integer cell zone identification number. In problems that have more than one cell zone, the cell zone ID can be used to identify the various groups of cells.

(in the Cell Info... category) is the integer cell zone type ID. A fluid cell has a type ID of 1, a solid cell has a type ID of 17, and an exterior cell (parallel solver) has a type ID of 21.

(in the Properties... category) is the ratio of the ideal gas density of the fluid divided by the real gas fluid density in the same flow conditions. Compressibility Factor is defined as

(42–5)

where is the compressibility factor, is the absolute pressure, is the temperature, and (the universal gas constant divided by the molecular weight ). The compressibility factor is available only with the real gas models.

(in the Velocity... category) is defined as

(42–6)

where is the density, is the speed of sound, is the laminar viscosity, and is the grid spacing in the normal direction of the wall. The Compressible Wall Reynolds Number is defined at the wall and applies only for laminar flows. To accurately predict the heat transfer on the wall, a Compressible Wall Reynolds Number less than one is recommended.

(in the Perforated Walls... category) is the heat transfer between solid walls and fluid calculated by Equation 7–133. Its unit quantity is power.

(in the Cell Info... category) is an integer identifier designating whether a cell is marked for flow blocking as part of a contact detection simulation that uses the contact marks method of flow control. Marked cells have a value of 1, whereas unmarked cells have a value of 0. This field variable is only available if you have enabled the following text command: define/dynamic-mesh/controls/contact-parameters/render-contact-cells?. Only cell values may be displayed for Contact Cell Mark, so you must ensure that the Node Values option is disabled in the Contours dialog box. See Contact Detection Settings for more information.

(in the Solidification/Melting... category) is the additional resistance at the wall due to contact resistance. It is equal to , where is the contact resistance, is the liquid fraction, and is the cell height of the wall-adjacent cell. The unit quantity for Contact Resistivity is thermal-resistivity.

(in the Properties... category) is the mixture critical pressure. This property is available when a composition dependent option is selected for critical pressure in the cases with Aungier-Redlich-Kwong real gas model and species transport.

(in the Properties... category) is the mixture critical specific volume. This property is available when a composition dependent option is selected for critical specific volume in the cases with Aungier-Redlich-Kwong real gas model and species transport.

(in the Premixed Combustion... category) is a parameter that takes into account the stretching and extinction of premixed flames ( in Equation 8–87 in the Theory Guide). Its unit quantity is time-inverse.

(in the Properties... category) is the mixture critical temperature. This property is available when a composition dependent option is selected for critical temperature in the cases with Aungier-Redlich-Kwong real gas model and species transport

(in the Turbulence... category) is the multiplier of the production term when curvature correction is selected for Spalart-Allmaras or two equation models. See Curvature Correction for the Spalart-Allmaras and Two-Equation Models in the Fluent Theory Guide for details.

are scalar field functions defined by you. You can create a custom function using the Custom Field Function Calculator Dialog Box. All defined custom field functions will be listed in the lower drop-down list. See Custom Field Functions for details.

(in the Premixed Combustion... category) is a nondimensional parameter that is defined as the ratio of turbulent to chemical time scales.

includes variables related to density.

(in the Density... category) is the mass per unit volume of the fluid. Plots or reports of Density include only fluid cell zones. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list. The unit quantity for Density is density.

(in the Density... category) is the mass per unit volume of the fluid or solid material. Plots or reports of Density All include both fluid and solid cell zones. The unit quantity for Density All is density.

are the viscous derivatives. For example, dX-Velocity/dx is the first derivative of the component of velocity with respect to the -coordinate direction. You can compute first derivatives of velocity, angular velocity, and pressure in the pressure-based solver, and first derivatives of velocity, angular velocity, temperature, and species in the density-based solvers.

(in the Turbulence... category) is available when you retain the temporary solver memory using the solve/set/advanced/retain-temporary-solver-mem text command. It is defined by Equation 4–272 in the Theory Guide for the Spalart-Allmaras based DES model and Equation 4–279 in the Theory Guide for the realizable k-epsilon based DES model. The DES length scale for the BSL / SST k-omega based DES model is defined by , where is a calibration constant used in the DES model and has a value of 0.61 and is the maximum local grid spacing ().

(in the Turbulence... category) is either the multiplier function for Detached Eddy Simulation (DES) with BSL, SST, or Transition SST (see DES with the BSL or SST k-ω Model and DES with the Transition SST Model in the Theory Guide for details) or the function for DES with Spalart-Allmaras or Realizable - (see Theory Guide DES with the Spalart-Allmaras Model or DES with the Realizable k-ε Model, respectively).

(in the Properties... category) is the diameter of particles, droplets, or bubbles of the secondary phase selected in the Phase drop-down list. Its unit quantity is length.

(in the User Defined Scalars... category) is the diffusion coefficient for the ^th user-defined scalar transport equation. See the Fluent Customization Manual for details about defining user-defined scalars.

includes quantities related to the discrete phase model sources. See Modeling Discrete Phase for details about this model.

includes non-source quantities related to the discrete phase model. See Modeling Discrete Phase for details about this model.

(in the Two-Temperature Model... category)is the vibrational-electronic energy change due to chemical reactions ( in Equation 5–28 in the Fluent Theory Guide).

(in the Discrete Phase Variables... category) is the absorption coefficient for discrete-phase calculations that involve radiation ( in Equation 5–56 in the Theory Guide). Its unit quantity is length-inverse.

(in the Discrete Phase Variables... category) is the accretion rate calculated at a wall boundary:

(42–7)

where is the mass flow rate of the particle stream, and is the area of the wall face where the particle strikes the boundary. This item will appear only if the optional erosion/accretion model is enabled. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Accretion is mass-flux.

(in the Discrete Phase Sources... category) is the exchange of mass from the discrete to the continuous phase for the combustion law (Law 5) and is proportional to the solid phase reaction rate. The burnout exchange has units of mass-flow and is reported as the rate occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the time rate of particle-to-particle collisions per unit volume. Its unit quantity is collision-rate.

(in the Discrete Phase Variables... category) is the total concentration of the particles in all phases in a cell. Its unit quantity is density. Note that Lagrangian wall film particles are not included when calculating the concentration.

(in the Discrete Phase Variables... category) is the concentration of the chemical <component>, as part of DPM particles, in the cell (that is, the mass of that particle component in the cell, divided by the cell volume). Its unit quantity is density. When using DDPM, this is calculated separately for each DDPM phase, but always using the entire cell volume. (The name of the component will replace <component> in DPM Conc of <component>, and for DDPM calculations, the field variable name will be appended with the phase name.)

(in the Discrete Phase Variables... category) is the mean particle density. This is computed as the mean density of the particles in each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is density.

(in the Discrete Phase Variables... category) is the surface mean diameter for the discrete phase particles within a cell. This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length. For the definition of the D20 diameter, refer to Summary Reporting of Current Particles.

(in the Discrete Phase Variables... category) is the volume mean diameter for the discrete phase particles within a cell. This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length. For the definition of the D30 diameter, refer to Summary Reporting of Current Particles.

(in the Discrete Phase Variables... category) is the Sauter mean diameter for the discrete phase particles within a cell. This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length. For the definition of the Sauter diameter, refer to Summary Reporting of Current Particles.

(in the Discrete Phase Variables... category) is the mean diameter over volume (also called De Brouckere mean diameter) for the discrete phase particles within a cell. This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length. For the definition of the De Brouckere diameter, refer to Summary Reporting of Current Particles.

(in the Discrete Phase Variables... category) is the mean particle diameter. This is computed as the mean diameter of the discrete phase particles in each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length.

(in the Discrete Phase Variables... category) is the amount of radiation emitted by a discrete-phase particle per unit volume. Its unit quantity is heat-generation-rate.

(in the Discrete Phase Variables... category) is the specific enthalpy. Depending on the particle type, the DPM Enthalpy is computed as:

Its unit quantity is specified in terms of enthalpy per unit mass.

(in the Discrete Phase Sources... category) is the exchange of enthalpy (sensible enthalpy plus heat of formation) from the discrete phase to the continuous phase. The exchange is positive when the particles are a source of heat in the continuous phase. The unit quantity for DPM Enthalpy Source is power and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the DNV erosion rate calculated using the DNV formulation. (See DNV Erosion Model in the Fluent Theory Guide for background information about this model.) This item will appear only if the DNV option is enabled in the Physical Models tab of the Discrete Phase Model Dialog Box. See Monitoring Erosion/Accretion of Particles at Walls for details.

(in the Discrete Phase Variables... category) is the erosion rate calculated at a wall boundary face using Equation 12–346 in the Fluent Theory Guide based on the values entered in the Generic Erosion Model Parameters dialog box (see Setting Particle Erosion and Accretion Parameters). This item will appear only if the Erosion/Accretion option is selected in the Physical Models tab of the Discrete Phase Model Dialog Box and the Generic Model option is enabled in the DPM tab of the Wall Dialog Box. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Erosion Rate (Generic) is mass-flux.

(in the Discrete Phase Variables... category) is the Finnie erosion rate calculated using the Finnie formulation. (See Finnie Erosion Model in the Fluent Theory Guide for background information about this model.) This item will appear only if the Finnie option is enabled in the Physical Models tab of the Discrete Phase Model Dialog Box. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Erosion Rate (Finnie) is mass-flux.

(in the Discrete Phase Variables... category) is the McLaury erosion rate calculated using the McLaury formulation. (See McLaury Erosion Model in the Fluent Theory Guide for background information about this model.) This item will appear only if the McLaury erosion model is enabled in the Physical Models tab of the Discrete Phase Model Dialog Box. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Erosion Rate (McLaury) is mass-flux.

(in the Discrete Phase Variables... category) is the Oka erosion rate calculated using the Oka formulation. (See Oka Erosion Model in the Fluent Theory Guide for background information about this model.) This item will appear only if the Oka erosion model is enabled in the Physical Models tab of the Discrete Phase Model Dialog Box. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Erosion Rate (Oka) is mass-flux.

(in the Discrete Phase Variables... category) is the abrasive erosion rate calculated using the shear stress formulation. See Modeling Erosion Rates in Dense Flows in the Fluent Theory Guide for background information about this model. See Monitoring Erosion/Accretion of Particles at Walls for details. The unit quantity for DPM Erosion Rate (Wall Shear) is mass-flux. This quantity is available for dense flows for which DPM erosion is enabled and with the disperse granular secondary phase.

(in the Discrete Phase Sources... category) is the exchange of mass, due to droplet-particle evaporation or combusting-particle devolatilization, from the discrete phase to the evaporating or devolatilizing species. If you are not using the non-premixed combustion model, the mass source for each individual species ( DPM species-n Source , below) is also available; for non-premixed combustion, only this sum is available. The unit quantity for DPM Evaporation/Devolatilization is mass-flow and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the mean Granular Temperature for the discrete phase particles within a cell. Its unit quantity is turbulent kinetic energy. This quantity is only available when using a granular secondary phase in the Dense Discrete Phase Model.

(in the Discrete Phase Sources... category) is the total exchange of mass from the discrete phase to the continuous phase. The mass exchange is positive when the particles are a source of mass in the continuous phase. If you are not using the non-premixed combustion model, DPM Mass Source will be equal to the sum of all species mass sources ( DPM species-n Source , below); if you are using the non-premixed combustion model, it will be equal to DPM Burnout plus DPM Evaporation/Devolatilization. The unit quantity for DPM Mass Source is mass-flow and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Sources... category) is the exchange of secondary mixture fraction from the discrete phase to the continuous phase. DPM Mixture Fraction Secondary Source is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Sources... category) is the exchange of mixture fraction from the discrete phase to the continuous phase. DPM Mixture Fraction Source is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the exchange of the inert stream from the discrete phase to the continuous phase. DPM Inert Source is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the number of particles per unit cell volume. This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is volume-inverse.

(in the Discrete Phase Variables... category)

This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase.

(in the Discrete Phase Variables... category)

This is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase.

(in the Discrete Phase Variables... category) is the RMS particle diameter. This is computed as the RMS particle diameter within each cell and is computed per phase. Therefore, when using DDPM, this quantity is available for each discrete phase and the mixture phase. Its unit quantity is length.

(in the Discrete Phase Variables... category) is the RMS particle temperature. This is computed as the RMS particle temperature within each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is temperature.

(in the Discrete Phase Variables... category) are the RMS X, Y, and Z Velocity components of the discrete phase. These are computed as the mean discrete phase RMS velocities and are computed per phase. Therefore, when using DDPM these quantities are available for each discrete phase and the mixture phase. Its unit quantity is velocity.

(in the Discrete Phase Variables... category) is the scattering coefficient for discrete-phase calculations that involve radiation ( in Equation 5–56 in the Theory Guide). Its unit quantity is length-inverse.

(in the Discrete Phase Sources... category) is the exchange of sensible enthalpy from the discrete phase to the continuous phase. The exchange is positive when the particles are a source of heat in the continuous phase. Its unit quantity is power and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Sources... category) is the exchange of mass, due to droplet-particle evaporation or combusting-particle devolatilization, from the discrete phase to the evaporating or devolatilizing species. (The name of the species will replace species-n in DPM species-n Source .) These species can be specified in the Set Injection Properties Dialog Box, and their descriptions can be found in Defining Injection Properties. The unit quantity is mass-flow and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases. Note that this variable will not be available if you are using the non-premixed combustion model; use DPM Evaporation/Devolatilization instead.

(in the Discrete Phase Variables... category) is the mean particle specific heat. This is computed as the mean specific heat of the particles within each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is specific-heat.

(in the Discrete Phase Sources... category) is the exchange of swirl momentum from the discrete phase to the continuous phase. This value is positive when the particles are a source of momentum in the continuous phase. The unit quantity is force and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) is the mean particle temperature. This is computed as the mean temperature of the particles within each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase. Its unit quantity is temperature.

(in the Discrete Phase Variables... category) is the volume fraction of the discrete phase. This is computed as the mean discrete phase volume fraction within each cell and is computed per phase. Therefore, when using DDPM this quantity is available for each discrete phase and the mixture phase.

(in the Discrete Phase Variables... category) is the magnitude of the wall force vector per unit area.

(in the Discrete Phase Variables... category) are the X, Y, and Z components of the DPM particle-wall force. These are computed on all wall boundary conditions. For steady-state simulations, the reported forces are the mean forces exerted by the particles per unit time. For transient simulations, the reported forces are the time-averaged particle-wall forces over the fluid time step.

(in the Discrete Phase Sources... category) are the exchange of -, -, and -direction momentum from the discrete phase to the continuous phase. These values are positive when the particles are a source of momentum in the continuous phase. The unit quantity is force and is reported as the rate of exchange occurring in each cell. A unit cell depth is used for 2D cases, and a reference cell depth of 1 radian is used for 2D axisymmetric cases.

(in the Discrete Phase Variables... category) are the X, Y, and Z Velocity components of the discrete phase. These are computed as the mean discrete phase velocities and are computed per phase. Therefore, when using DDPM these quantities are available for each discrete phase and the mixture phase. Its unit quantity is velocity.

(in the Potential... category) are the , , and components of the potential gradient field (, , and ), respectively.

(in the Reactions… category) is the number of retained reactions in reduced mechanism. This variable quantifies the size of the reduced mechanism at each cell or particle in the domain.

(in the Species... category) is the number of retained species in reduced mechanism. This variable quantifies the size of the reduced mechanism at each cell or particle in the domain.

(in the Mesh... category) is the change of a cell volume.

(in the Pressure... category) is defined as . Its unit quantity is pressure.

(in the Reactions... category) is the ^th electrochemical reaction rate. This quantity is only available if the electrochemical reaction model is enabled.

(in the Species... category) is the sum of the laminar and turbulent diffusion coefficients of a species into the mixture:

(42–8)

(The name of the species will replace species-n in Eff Diff Coef of species-n .) The unit quantity is mass-diffusivity.

(in the Turbulence... category) is the ratio , where is the effective viscosity, is the specific heat, and is the effective thermal conductivity.

(in the Properties... category) is the sum of the laminar and turbulent thermal conductivities, , of the fluid. A large thermal conductivity is associated with a good heat conductor and a small thermal conductivity with a poor heat conductor (good insulator). Its unit quantity is thermal-conductivity.

(in the Turbulence... category) is the sum of the laminar and turbulent viscosities of the fluid. Viscosity, , is defined by the ratio of shear stress to the rate of shear. Its unit quantity is viscosity.

(in the Potential... category) is the electric potential used in Equation 7–130 in the Fluent Theory Guide.

(in the Properties... category) is the electric conductivity used in Equation 7–118 in the Fluent Theory Guide.

(in the Potential... category) is the magnitude of the electric current vector in the field, .

(in the Potential... category) is either the electrode potential ( in the Butler-Volmer Equation 7–120 in the Fluent Theory Guide) for walls with Faradaic reaction, or the wall potential after considering the contact resistance effect for walls without Faradaic reaction.

(in the Potential... category) is the electrolyte potential used in Equation 20–4 in the Fluent Theory Guide.

(in the Temperature... category) is defined differently for compressible and incompressible flows, and depending on the solver and models in use.

For compressible flows,

(42–9)

and for incompressible flows,

(42–10)

where and are, respectively, the mass fraction and enthalpy of species . (See Enthalpy of species-n , below). For the pressure-based solver, the second term on the right-hand side of Equation 42–10 is included only if the pressure work term is included in the energy equation (see Inclusion of Pressure Work and Kinetic Energy Terms in the Theory Guide). For multiphase models, this value corresponds to the selected phase in the Phase drop-down list. For all reacting flow models, the Enthalpy plots consist of the thermal (or sensible) plus chemical energy. The unit quantity for Enthalpy is specific-energy.

In the case of the inert model (Using the Non-Premixed Model with the Inert Model in the Theory Guide), the enthalpy in a cell is split into the contributions from the inert and the reacting fractions of the gas phase species in the cell. The cell enthalpy is partitioned as

(42–11)

where is the fraction of inert species in the cell. The quantity is the enthalpy of the inert species at the cell temperature, similarly is the enthalpy of the active species at the cell temperature. It is assumed that the cell temperature is common to both inert and active species, so , and the cell temperature are chosen so that Equation 42–11 is satisfied.

(in the Species... category) is defined differently depending on the solver and models options in use. The quantity:

(42–12)

where is the formation enthalpy of species at the reference temperature , is reported only for non-adiabatic PDF cases, or if the density-based solver is selected. The quantity:

(42–13)

where , is reported in all other cases. The unit quantity for Enthalpy of species-n is specific-energy.

(in the Temperature... category) is a thermodynamic property defined by the equation

(42–14)

(42–15)

the entropy is computed using the equation

(42–16)

The unit quantity for entropy is specific-heat.

(in the Mesh... category) is the magnitude of the face area vector for noninternal faces (that is, faces that only have c0 and no c1). The values are stored on the face itself and used when required. This variable is intended only for zone surfaces and not for other surfaces created for postprocessing.

(in the Mesh... category) is a parameter that is equal to one in cells that are adjacent to left-handed faces, and zero elsewhere. It can be used to locate mesh problems.

(in the Potential... category) is the electric current density produced by the electrochemical reaction at Faradaic interfaces (Equation 7–127 in the Fluent Theory Guide). Faradaic current density is positive if electric current flows from the electrode zone to the electrolyte zone, and negative if the electric current flows in the reverse direction.

(in the Potential... category) is the energy source term due to the electrochemical reaction at Faradaic interfaces (Equation 7–132 in the Fluent Theory Guide).

(in the Sensitivities... category) This field is available when the Neural Network Model has been applied for turbulence model optimization within the Optimizer Design Variables dialog box, and is the Fifth Invariant flow feature.

(in the Eulerian Wall Film... category) is the Courant number of the wall film.

(in the Eulerian Wall Film... category) is the value of film wet area fraction as defined in Equation 17–30 in the Fluent Theory Guide. In reporting, the face integral of this variable gives the area covered by the film. This item is available when Solve Momentum is enabled in the Eulerian Wall Film dialog box.

(in the Eulerian Wall Film... category) is the additional energy of discrete particles being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the additional mass of discrete particles being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the x-component of any additional momentum of discrete particles being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the y-component of any additional momentum of discrete particles being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the z-component of any additional momentum of discrete particles being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the effective pressure of the wall film.

(in the Eulerian Wall Film... category) is the ratio of the film half-thickness to the cell center height next to the film wall.

(in the Eulerian Wall Film... category) is the mass of the wall film.

(in the Wall Film... category) is the mass fraction of the discrete phase material i in the wall film. (The name of the material will replace material-i in Film Mass Fraction of material-i .)

(in the Eulerian Wall Film... category) is the cumulative mass of film outflow.

(in the Eulerian Wall Film... category) is the passive scalar for the wall film scalar equation.

(in the Eulerian Wall Film... category) is the phase change rate, with positive value as the condensation rate and negative value as the vaporization rate. This item is available when Phase Change is enabled.

(in the Eulerian Wall Film... category) is the coefficient of secondary phase collection. This item is available when Phase Accretion is enabled.

(in the Eulerian Wall Film... category) is the mass of secondary phase collection. This item is available when Phase Accretion is enabled.

(in the Eulerian Wall Film... category) is the diameter of separated wall film droplet. This item is available when Edge Separation is enabled.

(in the Eulerian Wall Film... category) is the mass of secondary phase collection. This item is available when Edge Separation is enabled.

(in the Eulerian Wall Film... category) is the diameter of stripped wall film droplets.

(in the Eulerian Wall Film... category) is the cumulative mass of stripped wall film.

(in the Eulerian Wall Film... category) is the surface temperature of the wall film.

(in the Eulerian Wall Film... category) is the magnitude of the surface velocity of the wall film.

(in the Eulerian Wall Film... category) is the x-component of the surface velocity of the wall film.

(in the Eulerian Wall Film... category) is the y-component of the surface velocity of the wall film.

(in the Eulerian Wall Film... category) is the z-component of the surface velocity of the wall film.

(in the Eulerian Wall Film... category) is the temperature of the wall film.

(in the Eulerian Wall Film... category) is the thickness of the wall film.

(in the Eulerian Wall Film... category) is the sum of the film height fraction and the height fraction computed from the VOF equivalent film thickness.

(in the Eulerian Wall Film... category) is the sum of film VOF equivalent thickness and the film thickness.

(in the Eulerian Wall Film... category) is the sum of the film volume fraction and the liquid phase volume fraction in the VOF solution.

(in the Eulerian Wall Film... category) is the magnitude of the velocity of the wall film.

(in the Eulerian Wall Film... category) is the equivalent film thickness computed from the liquid phase volume fraction from the VOF solution in the cell adjacent to the film wall.

(in the Eulerian Wall Film... category) is the total exchanged mass rate between the EWF and VOF multiphase models. A positive value indicates net mass transfer from the VOF to the film solution, and a negative value indicates net mass transfer from the film to the VOF solution.

(in the Eulerian Wall Film... category) is the mass exchange between the EWF and VOF multiphase models during the last flow time step. A positive value indicates mass transfer from the VOF to film solution, and a negative value indicates mass transfer from the film to the VOF solution.

(in the Eulerian Wall Film... category) is the ratio of the film liquid volume to the cell volume next to the film wall.

(in the Eulerian Wall Film... category) is the Weber number of the wall film.

(in the Eulerian Wall Film... category) is the x-component of any additional momentum being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the y-component of any additional momentum being absorbed into the wall film.

(in the Eulerian Wall Film... category) is the x-component of the velocity of the wall film.

(in the Eulerian Wall Film... category) is the y-component of the velocity of the wall film.

(in the Eulerian Wall Film... category) is the z-component of the velocity of the wall film.

(in the Species... category) is the term in Equation 7–42 in the Theory Guide.

(in the Temperature... category) is the temperature of the fine scales, which is calculated from the enthalpy when the reaction proceeds over the time scale ( in Equation 7–45 in the Theory Guide), governed by the Kinetic rates of Equation 7–21 in the Theory Guide. Its unit quantity is temperature.

(in the Species... category) is the transfer rate of the fine scales, which is equal to the inverse of the time scale ( in Equation 7–45 in the Theory Guide). Its unit quantity is time-inverse.

(in the Species... category) is a function of the fine scale volume fraction ( in Equation 7–44 in the Theory Guide). The quantity is subtracted from unity to make it easier to interpret.

(in the Eulerian Wall Film... category) is the cumulative mass of separated wall film.

(in the Cell Info... category) identifies the interfaces of flow-blocking gap regions. All cells that have at least one face that applies the zero-mass-flux boundary for the gap region have a value of 1, whereas all other cells have a value of 0. For further details, see Controlling Flow in Narrow Gaps for Valves and Pumps.

(in the Phase Interaction... category) are the blending factors for the continuous-continuous, continuous-dispersed, dispersed-continuous, and dispersed-dispersed phase interactions, respectively, which are used for the flow regime detection. The blending factors must satisfy the following restriction:

(42–17)

This item is available only for mixture multiphase cases with the flow regime modeling. For further details, see Flow Regime Modeling in the Fluent Theory Guide.

(in the Premixed Combustion... category) is the rate of production of species-n due to forward reactions for scalar in kg/m ³ /s ( in Equation 8–120 in the Fluent Theory Guide). (The name of the PDF scalar will replace PDF scalar-n in Forward Reaction Rate of PDF scalar-n .)

This field is available when the Neural Network Model has been applied for turbulence model optimization within the Optimizer Design Variables dialog box, and is the Fourth Invariant flow feature.

(in the Two-Temperature Model... category) is defined as where is the translational-rotational heat capacity ratio.

(in the Pdf... category) is the production term in the mixture fraction variance equation solved in the non-premixed combustion model (that is, the last two terms in Equation 8–5 in the Theory Guide).

(in the Pdf... category) is the production term in the secondary mixture fraction variance equation solved in the non-premixed combustion model. See Equation 8–5 in the Theory Guide.

(in the Cell Info... category) is the gap region ID, as identified using the List button in the Gap Model Dialog Box. All cells that are not marked for a gap region have a value of 0. For further details, see Controlling Flow in Narrow Gaps for Valves and Pumps.

(in the Cell Info... category) is the type of gap region. Cells that are marked as part of a flow-blocking gap region have a value of 1, cells that are marked as part of a flow-modeling gap region have a value of 2, and cells that are not marked for a gap region have a value of 0. For further details, see Controlling Flow in Narrow Gaps for Valves and Pumps.

(in the Properties... category) is the gas constant of the fluid. Its unit quantity is specific-heat.

(in the Turbulence... category) is used in the roughness correlation of the Transition SST model. See Equation 4–189 in the Theory Guide.

(in the Mesh... category) is a measure used to apply poor mesh numerics to cells when the cell gradient quality criterion is enabled; poor cells have a value closer to 0, whereas good cells have a value closer to 1.

(in the Properties... category) is equivalent to the diffusion coefficient in Equation 14–374 in the Theory Guide. For more information, see Granular Temperature in the Theory Guide. Its unit quantity is kg/m-s.

includes quantities for reporting the solids pressure for each granular phase ( in Equation 14–345 in the Theory Guide). See Solids Pressure in the Theory Guide for details. Its unit quantity is pressure. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

includes quantities for reporting the granular temperature for each granular phase ( in Equation 14–374 in the Theory Guide). See Granular Temperature in the Theory Guide for details. Its unit quantity is . For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the NOx... category) is the mass per unit volume of HCN. The unit quantity is density. The hcn Density will appear only if you are modeling fuel NOx. See Fuel NOx Formation in the Theory Guide for details.

(in the Phase Interaction... category) is the heat added or removed due to heterogeneous chemical reactions. For exothermic reactions the Heat of Heterogeneous Reaction is reported as a positive quantity, while for endothermic reactions it will be a negative quantity. If you have more than one heterogeneous reaction defined in your case, the Heat of Heterogeneous Reaction reported is the sum of the heat for all heterogeneous reactions. The unit quantity of Heat of Heterogeneous Reaction is Watt.

(in the Reactions... category) is the heat added or removed due to chemical reactions. The quantity reported by Fluent is the volumetric heat of reaction, as defined in Equation 5–11 in the Theory Guide multiplied by the cell volume. For exothermic reactions, the heat of reaction is reported as a positive quantity, while for endothermic reactions it is reported as a negative quantity. If you have more than one reaction defined in your case, the Heat of Reaction reported is the sum of the heat for all reactions. The unit of measurement for the heat of reaction is Watts. The Heat of Reaction is not available for the non-premixed and partially-premixed models.

(in the Pdf... category) is the rate of heat generated due to chemical reaction (J/m3/s) as defined in Equation 5–11 in the Fluent Theory Guide.

(in the Velocity... category) is defined by the dot product of vorticity and the velocity vector.

(42–18)

Vorticity is a measure of the rotation of a fluid element as it moves in the flow field.

(in the Radiation... category) is the total radiation energy, , that arrives at a location per unit time and per unit area:

(42–19)

where is the radiation intensity and is the solid angle. is the quantity that the P-1 radiation model computes. For the DO radiation model, the incident radiation is computed over a finite number of discrete solid angles, each associated with a vector direction. For the MC model, the radiation intensity is computed by tallying the distance traveled by photons in each cell. The unit quantity for Incident Radiation is heat-flux.

(in the Radiation... category) is the radiation energy contained in the wavelength band for the non-gray P-1, DO, or MC radiation models. Its unit quantity is heat-flux.

(in the Perforated Walls... category) is the mass flow rate calculated by Equation 7–131 (incompressible flow) or Equation 7–132 (compressible flow). Note that the mass flow rate will be the same for the faces that belong to the same effusion surface (uniform type) or perforated hole (discrete type).

(in the Perforated Walls... category) is the averaged pressure used in the mass flow rate calculation in Equation 7–131 (incompressible flow) or Equation 7–132 (compressible flow). Note that the injection pressure will be the same for the faces that belong to the same effusion surface (uniform type) or perforated hole (discrete type).

(in the Mesh... category) is a metric for measuring the quality of the intersection between interface zones for non-conformal interfaces. It is calculated on each element of the interface zone and ranges from 0 to 1, where 0 means no intersection, and 1 means full intersection.

(in the Turbulence... category) is a measure of the probability that a given point is located inside a turbulent region. Upstream of transition the intermittency is zero. Once the transition occurs, the intermittency is ramped up to one until the fully turbulent boundary layer regime is achieved.

(in the Turbulence... category) is used in the coupling of the Transition model and the SST Transport equations (see Coupling the Transition Model and SST Transport Equations in the Theory Guide for details).

(in the Temperature... or Two-Temperature Model... category) is the summation of the kinetic and potential energies of the molecules of the substance per unit volume (and excludes chemical and nuclear energies). Internal Energy is defined as . Its unit quantity is specific-energy.

(in the Acoustics... category) is the acoustic power for turbulent axisymmetric jets (see Equation 11–20 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used.

(in the Acoustics... category) is the acoustic power for turbulent axisymmetric jets, reported in dB (see Equation 11–33 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used.

(in the Potential... category) is the energy source term due to the Joule heating (Equation 18–2 in the Fluent Theory Guide).

(in the Reactions... category) is given by the following expression (see Equation 7–21 in the Theory Guide for definitions of the variables shown here):

(42–20)

The reported value is independent of any particular species, and has units of kmol/ -s.

To find the rate of production/destruction for a given species due to reaction , multiply the reported reaction rate for reaction by the term , where is the molecular weight of species , and and are the stoichiometric coefficients of species in reaction .

For particle reactions it is the global rate of the particle reaction n expressed in kmol/s/m3. This is computed as , where is the rate of particle species depletion (or generation) given by Equation 7–102 in the Theory Guide, is the particle species molecular weight, and is the cell volume.

(in the Velocity... category) is a postprocessing quantity used for visual inspection of turbulence structures.

(in the Species... category) is the laminar diffusion coefficient of a species into the mixture, . Its unit quantity is mass-diffusivity.

(in the Premixed Combustion... category) is the propagation speed of laminar premixed flames ( in Equation 8–77 in the Theory Guide). Its unit quantity is velocity.

(in the Turbulence...category) is a measure of the “laminar” streamwise fluctuations present in the pre-transitional region of the boundary layer subjected to free-stream turbulence. A transport equation of kl is considered by the k-kl-omega transition model.

(in the Phase Interaction... category) is the latent heat for the n ^th mass transfer mechanism that you defined.

(in the Acoustics... category) are the self-noise source terms in the linearized Euler equation for the acoustic velocity component (see Equation 11–38 in the Theory Guide). They are available only when the Broadband Noise Sources acoustics model is being used.

(in the Acoustics... category) are the shear-noise source terms in the linearized Euler equation for the acoustic velocity component (see Equation 11–38 in the Theory Guide). They are available only when the Broadband Noise Sources acoustics model is being used.

(in the Acoustics... category) are the total noise source terms in the linearized Euler equation for the acoustic velocity component (see Equation 11–38 in the Theory Guide). The total noise source term is the sum of the self-noise and shear-noise source terms. They are available only when the Broadband Noise Sources acoustics model is being used.

(in the Sensitivities... category) This field is available when the Neural Network Model has been applied for turbulence model optimization within the Optimizer Design Variables dialog box, and is the length ratio flow feature.

(in the Turbulence... category) is the eddy viscosity that is determined by the local algebraic sub-grid scale model in an embedded LES zone, which actually affects the momentum transport equations (see Embedded Large Eddy Simulation (ELES) in the Theory Guide). Its unit quantity is viscosity.

(in the Acoustics... category) is the self-noise source term in the linearized Lilley’s equation (see Equation 11–42 in the Theory Guide), available only when the Broadband Noise Sources acoustics model is being used.

(in the Acoustics... category) is the shear-noise source term in the linearized Lilley’s equation (see Equation 11–42 in the Theory Guide), available only when the Broadband Noise Sources acoustics model is being used.

(in the Acoustics... category) is the total noise source term in the linearized Lilley’s equation (see Equation 11–42 in the Theory Guide). The total noise source term is the sum of the self-noise and shear-noise source terms, available only when the Broadband Noise Sources acoustics model is being used.

(in the Solidification/Melting... category) is the liquid fraction computed by the solidification/melting model:

(42–21)

(42–22)

(42–23)

(in the Phase Interaction... category) is the liquid subcooling of the boiling model defined as:

where and are the saturation and liquid temperatures.

This item is available for the Eulerian multiphase boiling model only.

(in the Lithium... category) is the lithium concentration in the electrode ( in Equation 18–13 in the Fluent Theory Guide) or in the electrolyte ( in Equation 18–14 in the Fluent Theory Guide). The unit quantity is kmol/m ³.

(in the Sensitivities... category) provides a convenience function that plots of the magnitude, in view of the large range of values possible for the shape sensitivity magnitude. This allows the importance of the surfaces in a domain to be ranked more easily based on how they affect the observation of interest when they are reshaped.

(in the Density... category) is defined as:

(42–24)

where , is density, and is velocity. The term provides directional information on the density gradient. yields a positive value in the shock and a negative value in the expansion fan. Therefore, shocks and expansions can be differentiated using the Logarithmic Streamwise Schlieren definition. The Logarithmic function is introduced to display numerical data over a wide range and simultaneously maintain the sign of . Plots or reports of Logarithmic Streamwise Schlieren include only fluid cell zones.

(in the Lump Detection... category) is a measure of the non-sphericity of the liquid lump according to the surface-radius orthogonality method.

(in the Lump Detection... category) is a measure of the non-sphericity of the liquid lump according to the radius standard deviation method.

( in the Lump Detection... category) is a volume-weighted average of the lump density.

(in the Lump Detection... category) is the diameter of a volume-equivalent sphere.

(in the Lump Detection... category) is the average specific enthalpy of the lump. This quantity is available only when the energy equation is enabled.

(in the Lump Detection... category) is a unique integer value for every contiguous portion of liquid. One ID is assigned to the liquid core, and other IDs are assigned to each detached lump.

(in the Lump Detection... category) is the average pressure of the lump. This quantity is available only when the energy equation is enabled.

(in the Lump Detection... category) is the average temperature of the lump. This quantity is available only when the energy equation is enabled.

(in the Lump Detection... category) are the X, Y, and Z coordinates of the center of gravity of the liquid lump.

(in the Lump Detection... category) are the X, Y, and Z components of the liquid lump velocity vector.

(in the Velocity... category) is the ratio of velocity and speed of sound.

(in the Lithium... category) is the magnitude of the lithium mass flux vector in Equation 18–4 in the Fluent Theory Guide. The unit quantity is kmol/m² s^-1.

(in the Sensitivities... category) is the magnitude of the adjoint velocity primitive field. This field can be interpreted as the magnitude of the sensitivity of the observable to body force per unit volume. It can be used to identify regions in the domain where small changes to the momentum balance in the flow can have a large or small effect on the observable. This field is often observed to be large, for example, upstream of a body for which drag sensitivity is of interest, with the field diminishing in the upstream direction. This indicates the interference effect for an object positioned at various locations upstream of the object of interest.

(in the Sensitivities... category) This field is available when the Neural Network Model is selected for turbulence model optimization within the Optimizer Design Variables dialog box. Large values for the Mahalanobis distance suggest large deviations in flow features compared to the training data results.

(in the Mesh... category) is a parameter that can be used to mark and/or display invalid and poor elements. The solver variable can take a value of 1 to 6 and can be visualized:

By default 3.0, 4.0 and 5.0 are active. 2.0 is recommended.

(in the Two-Temperature Model... category) is the mass-averaged translational-vibrational relaxation time.

(in the Species... category) is the mass of a component in phase per unit phase volume:

where is the density of phase , and is the mass fraction of component in phase .

(in the Species... category) is the mass of a component in phase per unit cell volume:

where is the density of phase , is the mass fraction of component in phase , and is the volume fraction of phase . You can use a volume integral of this quantity to report the mass of a phase component as described in Multiphase Species Transport.

(in the NOx... category) are the mass of HCN, the mass of NH₃, the mass of NO, and the mass of N₂O per unit mass of the mixture (for example, kg of HCN in 1 kg of the mixture). The Mass fraction of Pollutant hcn and the Mass fraction of Pollutant nh3 will appear only if you are modeling fuel NOx. See Fuel NOx Formation in the Theory Guide  for details.

(in the Soot... category) is the number of particles per unit mass of the mixture (in units of particles /kg) The Mass fraction of nuclei will appear only if you use the two-step soot model. See Soot Formation for details.

(in the Soot... category) is the mass of soot per unit mass of the mixture (for example, kg of soot in 1 kg of the mixture). See Soot Formation for details.

(in the Species... category) is the mass of a species per unit mass of the mixture (for example, kg of species in 1 kg of the mixture).

(in the Phase Interaction... category) is the interphase mass transfer coefficient. Its unit quantity is velocity.

(in the Phase Interaction... category) is the mass transfer rate for the n ^th mass transfer mechanism that you defined.

(in the Steady Statistics... or Unsteady Statistics... category) is the iteration- or time-averaged value of a solution variable n (for example, Static Pressure). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the Steady Statistics... or Unsteady Statistics... category) is the iteration- or time-averaged value of a custom field function cff_n (for example, uns-custom-function-0). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the Steady Statistics... or Unsteady Statistics... category) is the iteration- or time-averaged value of a discrete phase variable n (for example, Volume Fraction). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the Mesh... category) is the normalized (dimensionless) coordinate that follows the flow path from inlet to outlet. Its value varies from to .

includes variables related to the mesh.

(in the Velocity... category) is a non-dimensional value that indicates the number of cells that might be swept in a single time step due to a mesh motion. This field variable is available for transient cases that involve either dynamic mesh or cell zones with frame or mesh motion.

(in the Velocity... category) are the vector components of the mesh velocity for moving-mesh problems (rotating or multiple reference frames, mixing planes, sliding meshes, or solid motion). Its unit quantity is velocity.

(in the Pdf... category) is the variance of the mixture fraction solved for in the non-premixed combustion model. This is the second conservation equation (along with the mixture fraction equation) that the non-premixed combustion model solves. (See Definition of the Mixture Fraction in the Theory Guide.)

(in the Turbulence... category) is the transported quantity that is solved for in the Spalart-Allmaras turbulence model and in DES with the Spalart-Allmaras model (see Equation 4–15 in the Theory Guide). The turbulent viscosity, , is computed directly from this quantity using the relationship given by Equation 4–16 in the Theory Guide. Its unit quantity is viscosity.

(in the Species... category) is the moles per unit volume of a species. Its unit quantity is concentration.

(in the Species... category) is the number of moles of a species in one mole of the mixture.

(in the NOx... category) are the number of moles of HCN, , NO, and N ₂ O in one mole of the mixture. The Mole fraction of Pollutant hcn and the Mole fraction of Pollutant nh3 will appear only if you are modeling fuel NOx. See Fuel NOx Formation in the Theory Guide for details.

(in the Soot... category) is the number of moles of soot in one mole of the mixture.

(in the Properties... category) is the ratio .

(in the Properties... category) is the laminar viscosity of the fluid. Viscosity, , is defined by the ratio of shear stress to the rate of shear. Its unit quantity is viscosity. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list. For a granular phase, the molecular viscosity is multiplied by the granular volume fraction.

(in the Turbulence... category) is based on the momentum thickness of the boundary layer. The SST transition model is considering a nonlocal empirical correlation for the value of in the free-stream, based on turbulence intensity, pressure gradient, and so on, and a transport equation to allow the free-stream value to diffuse into the boundary layer.

(in the Velocity... category) is the minimum of all the selected and relevant time scales in the whole domain. Note that the final time-step size is estimated only from interfacial cells. This field variable is available for transient VOF cases that involve Multiphase Specific Time Stepping.

(in the NOx... category) are the mass per unit volume of NH ₃, NO, and N ₂ O. The unit quantity for each is density. The nh3 Density will appear only if you are modeling fuel NOx. See Fuel NOx Formation in the Theory Guide for details.

(in the Temperature... category) is the average temperature determined by the non-local boundary field (NLBF) model. This item is available when NLBF Model is enabled in the in the Boiling Model dialog box.

(in the Sensitivities... category) This field is available when the Neural Network Model has been applied for turbulence model optimization within the Optimizer Design Variables dialog box, and is the Non-Equilibrium Parameter flow feature.

(in the Temperature... category) is the scaled value of thermal conductivity for the fluid zone () or for the overlapping solid zone (), where is the porosity, is the fluid phase thermal conductivity (including the turbulent contribution, ), and is the solid medium thermal conductivity. These terms can be seen in Equation 7–14 and Equation 7–15.

See Non-Equilibrium Thermal Model Equations and Non-Equilibrium Thermal Model for details about the non-equilibrium thermal model.

(in the Sensitivities... category) shows the normal component of the optimal displacement computed from the adjoint design tool calculation. This field is defined only for portions of walls lying within the control-volume specified for morphing. A positive value of displacement indicates that the surface will be displaced into the flow domain, whereas a negative value of displacement corresponds to wall movement outwards from the flow domain. This field eliminates the component of the optimal displacement vector that lies in the plane of the wall.

(in the Sensitivities... category) shows the normal component of the shape sensitivity. A positive value indicates an orientation directed into the domain, while a negative value indicates that the shape sensitivity is oriented outwards from the domain. This field eliminates the component of the vector shape sensitivity field that lies in the plane of the wall.

(in the Soot... category) is the normalized soot particle number density.

(in the Soot... category) is the normalized soot aggregate moments. This quantity is available only with the Method of Moments model.

(in the Soot... category) are the normalized soot moments. This quantity is available only with the Method of Moments model.

contains quantities related to the NOx model. See NOx Formation for details about this model.

(in the Sensitivities... category) are the individual components of the optimal displacement computed from the adjoint design tool calculation. These fields are defined only for portions of walls lying within the control-volume specified for morphing.

(in the Mesh... category) is a measure of the quality of a mesh, and is computed as described in Mesh Quality. The worst cells will have an Orthogonal Quality closer to 0, with better cells closer to 1.

(in the Potential... category) is the third term in Equation 18–17 in the Fluent Theory Guide.

(in the Potential... category) is the surface overpotential and in Equation 20–5 and Equation 20–6 in the Fluent Theory Guide.

(in the Cell Info... category) is an integer value indicating the overset cell type. Each cell can have one of the following values:

(in the Cell Info... category) shows the number of donor cells a receptor cell has for data interpolation. A value of zero indicates that the cell is not a receptor, or that the receptor cell is an orphan cell.

(in the Mesh... category) is the ratio of the donor cell volume () divided by its smallest receptor cell volume (). This field variable allows you to determine if your donor cells are excessively large and so in need of refinement.

(in the Cell Info... category) shows the number of receptor cells referencing a donor cell. A value of zero indicates that the cell is not a donor cell.

(in the Soot... category) is a soot primary particle diameter within soot aggregates. This quantity is available only with the Method of Moments model.

(in the Mesh... category) is the smallest number of cells that must be traversed to reach the nearest partition (interface) boundary.

(in the Cell Info... category) is the number of adjacent partitions (that is, those that share at least one partition boundary face (interface)). It gives a measure of the number of messages that will have to be generated for parallel processing.

contains quantities related to the non-premixed combustion model, which is described in Modeling Non-Premixed Combustion.

is the adiabatic enthalpy corresponding to the cell value of mixture fraction. For single mixture fraction cases it is given by the following equation:

(42–25)

and for cases involving a secondary stream it is given by the following equation:

(42–26)

For adiabatic cases the PDF Table Adiabatic Enthalpy is equal to the value of Enthalpy. The unit of measurement is specific-energy.

is given by the following equation:

(42–27)

if the cell enthalpy is less than the adiabatic enthalpy, and by the following equation:

(42–28)

if the cell enthalpy is higher than adiabatic

The PDF Table Heat Loss/Gain is dimensionless and ranges in value from -1, when is equal to , to +1, when is equal to . If H is equal to the adiabatic enthalpy it will be 0.

contains quantities for reporting the volume fraction of each phase. See Modeling Multiphase Flows for details.

(in the Mesh... category) is the normalized (dimensionless) coordinate in the circumferential (pitchwise) direction. Its value varies from to .

(in the Species... category) is the amount of a surface species that is deposited on porous zones. Its unit quantity is mass-flux.

(in the Velocity... category) is the reference velocity used in the coupled solver’s preconditioning algorithm. See Preconditioning in the Theory Guide for details.

contains quantities related to the premixed combustion model, which is described in Modeling Premixed Combustion.

includes quantities related to a normal force per unit area (the impact of the gas molecules on the surfaces of a control volume).

(in the Pressure... category) is a dimensionless parameter defined by the equation

(42–29)

and is the reference dynamic pressure defined by . The reference pressure, density, and velocity are defined in the Reference Values Task Page.

(in the Pressure... category) is a binary identifier based on whether a cell is in proximity to a pressure discontinuity (in which case the value = 1) or not (value = 0). Note that this field variable will display only the strongest part of the shock front and not necessarily the entire shock system; often the shock runs longer than indicated. For details, see Enabling High-Speed Numerics.

(in the Derivatives... category) is an indicator of the solution error, as approximated from the Hessian (the matrix of second derivatives) of the pressure distribution. The error is expected to be higher in cells that have a higher value compared to other cells in the domain, and so this field variable may indicate where refinement is needed to increase accuracy. This indicator is used as part of the predefined criteria for adaption (under Aerodynamics... / Error-based / Pressure Hessian Indicator), as described in Aerodynamics Adaption. For further details on how the indicator is calculated, see the description of the Hessian approach in Approaches For Deriving Field Values.

(in the Acoustics... category) is the imaginary part of the complex Fourier amplitudes for Fourier mode n, as calculated by the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for details.

(in the Acoustics... category) is the real part of the complex Fourier amplitudes for Fourier mode n, as calculated by the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for details.

(in the Premixed Combustion... category) is the source term in the progress variable transport equation ( in Equation 8–70 in the Theory Guide). Its unit quantity is time-inverse.

(in the Turbulence... category) is the rate of production of turbulence kinetic energy (times density). Its unit quantity is turb-kinetic-energy-production. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the Turbulence... category) is the production of laminar kinetic energy used in the - - transition model. See Transport Equations for the k-kl-ω Model in the Theory Guide for more details (Equation 4–150).

(in the Premixed Combustion... category) is a normalized mass fraction of the combustion products () or unburnt mixture products (), as defined by Equation 8–107 in the Theory Guide.

(in the Premixed Combustion... category) is the variance of the reaction progress variable that is solved in the partially-premixed combustion model.

includes material property quantities for fluids and solids.

(in the Acoustics... category) is the power spectral density of the flow pressure time derivative dp/dt. It is an integral value for the standard technical octave band (or the standard technical 1/3-octave band) at the central frequency x, or for the user-defined constant width band number n. These fields are calculated in the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for the workflow details, and Specifying a Function for the Y Axis for the calculation recipe of PSD for a frequency band. Note that the Fourier magnitude of an individual dp/dt harmonic at frequency f is computed based on the magnitude of the correspondent harmonic of pressure by multiplying it with 2π f.

(in the Velocity... category) is a postprocessing quantity used for visual inspection of turbulence structures. It is defined by the equation:

(42–30)

where and are reference length and velocity, defined in the Reference Values Task Page.

and the definitions of and in the following definition of Q Criterion Raw in Equation 42–32.

(in the Velocity... category) is a postprocessing quantity used for visual inspection of turbulence structures. It is defined by the equation:

(42–31)

where and are norms of the vorticity and the strain rate tensors, respectively:

(42–32)

The definitions of Vorticity Magnitude and Strain Rate, which are provided separately in this list, are equivalent to the definitions of and above.

(in the Mesh... category) is the length of the radius vector in the polar coordinate system. The radius vector is defined by a line segment between the node and the axis of rotation. You can define the rotational axis in the Fluid Dialog Box. (See also Velocity Reporting Options.) The unit quantity for Radial Coordinate is length.

(in the Solidification/Melting... category) is the radial-direction component of the pull velocity for the solid material in a continuous casting process. Its unit quantity is velocity.

(in the Velocity... category) is the component of velocity in the radial direction. (See Velocity Reporting Options for details.) The unit quantity for Radial Velocity is velocity. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the Wall Fluxes... category) is the radial component of the force per unit area acting tangential to the surface due to friction. Its unit quantity is that of pressure.

includes quantities related to radiation heat transfer. See Modeling Radiation for details about the radiation models available in Ansys Fluent.

(in the Wall Fluxes... category) is the rate of radiation heat transfer through the control surface. It is calculated by the solver according to the specified radiation model. Heat flux out of the domain is negative, and heat flux into the domain is positive. The unit quantity for Radiation Heat Flux is heat-flux.

(in the Radiation... category) is the statistical standard deviation for the spherical mean radiation intensity.

(in the Radiation... category) is the quantity , defined by

(42–33)

where is the Incident Radiation. The unit quantity for Radiation Temperature is temperature.

(in the Soot... category) is the rate of the coagulation of soot particles.

(in the NOx... category) is the overall rate of formation of NO due to all active NO formation pathways (for example, thermal, prompt, and so on).

(in the Soot... category) is the rate of nucleation of the soot particles.

(in the Soot... category) is the overall rate of formation of nuclei.

(in the NOx... category) is the rate of formation of NO due to the N ₂ O pathway only (only available when N ₂ O pathway is active).

(in the Soot... category) is the rate of oxidation of the soot particles.

(in the NOx... category) is the rate of formation of NO due to the prompt pathway only (only available when prompt pathway is active).

(in the NOx... category) is the rate of formation of NO due to the reburn pathway only (only available when reburn pathway is active).

(in the NOx... category) is the rate of formation of NO due to the SNCR pathway only (only available when SNCR pathway is active).

(in the Soot... category) is the overall rate of formation of soot mass.

(in the Soot... category) is the overall rate of soot nucleation.

(in the Soot... category) is the rate of the soot particle surface growth due to reactions at soot particle surface.

(in the NOx... category) is the rate of formation of NO due to the thermal pathway only (only available when thermal pathway is active).

(in the NOx... category) is the rate of formation of NO due to the fuel pathway only (only available when fuel pathway is active).

(in the NOx... category) is the rate of formation of NO due to user defined rates only (only available when user-defined function rates are added).

(in the Reactions... category) is the effective rate of progress of ^th reaction. For the finite-rate model, the value is the same as the Kinetic Rate of Reaction-n. For the eddy-dissipation model, the value is equivalent to the Turbulent Rate of Reaction-n. For the finite-rate/eddy-dissipation model, it is the lesser of the two.

For particle reactions it is the global rate of the particle reaction n expressed in kmol/s/m ³. This is computed as

where is the rate of particle species depletion (or generation) given by Equation 7–102 in the Theory Guide, is the particle species molecular weight, and is the cell volume.

includes quantities related to finite-rate reactions. See Modeling Species Transport and Finite-Rate Chemistry for information about modeling finite-rate reactions.

(in the Species... category) is the mass of a species per unit mass of the mixture in the reactor network.

(in the Species... category) is the computed temperature of the reactor network.

(in the Species... category) a unique identifier associated with each reactor network.

(in the Properties... category) is the ratio of the fluid temperature divided by the critical temperature . The reduced temperature is available only with the Angier-Redlich-Kwong real gas model.

(in the Properties... category) is the ratio of the fluid pressure divided by the critical pressure . The reduced pressure is available only with the Angier-Redlich-Kwong real gas model.

(in the Wall Fluxes... category) is the amount of radiative heat flux reflected by a semi-transparent wall for a particular band of radiation. Its unit quantity is heat-flux.

(in the Wall Fluxes... category) is the amount of solar heat flux reflected by a semi-transparent wall or porous jump boundary for a visible or infrared (IR) radiation.

(in the Radiation... category) is a nondimensional parameter defined as the ratio of the speed of light in a vacuum to that in a material. See Specular Semi-Transparent Walls in the Theory Guide for details.

(in the Velocity... category) is the axial-direction component of the velocity relative to the reference frame motion. See Velocity Reporting Options for details. The unit quantity for Relative Axial Velocity is velocity.

(in the Species... category) is the ratio of the partial pressure of the water vapor actually present in an air-water mixture to the saturation pressure of water vapor at the mixture temperature. Ansys Fluent computes the saturation pressure, , from the following equation  [129]:

(42–34)

(in the Velocity... category) is the nondimensional ratio of the relative velocity and speed of sound.

(in the Velocity... category) is the radial-direction component of the velocity relative to the reference frame motion. (See Velocity Reporting Options for details.) The unit quantity for Relative Radial Velocity is velocity.

(in the Velocity... category) is the tangential-direction component of the velocity relative to the reference frame motion, in an axisymmetric swirling flow. (See Velocity Reporting Options for details.) The unit quantity for Relative Swirl Velocity is velocity.

(in the Velocity... category) is the tangential-direction component of the velocity relative to the reference frame motion. (See Velocity Reporting Options for details.) The unit quantity for Relative Tangential Velocity is velocity.

(in the Temperature... category) is defined as where is enthalpy and is the relative velocity magnitude.

(in the Pressure... category) is the stagnation pressure computed using relative velocities instead of absolute velocities; that is, for incompressible flows the dynamic pressure would be computed using the relative velocities. (See Velocity Reporting Options for more information about relative velocities.) The unit quantity for Relative Total Pressure is pressure.

(in the Temperature... category) is the stagnation temperature computed using relative velocities instead of absolute velocities. (See Velocity Reporting Options for more information about relative velocities.) The unit quantity for Relative Total Temperature is temperature.

(in the Velocity... category) is similar to the Velocity Angle except that it uses the relative tangential velocity, and is defined as

(42–35)

Its unit quantity is angle.

(in the Velocity... category) is the magnitude of the relative velocity vector instead of the absolute velocity vector. The relative velocity () is the difference between the absolute velocity () and the mesh velocity. For simple rotation, the relative velocity is defined as

(42–36)

where is the angular velocity of a moving reference frame about the origin and is the position vector. (See Velocity Reporting Options for details.) The unit quantity for Relative Velocity Magnitude is velocity.

(in the Velocity... category) are the -, -, and -direction components of the velocity relative to the reference frame motion. (See Velocity Reporting Options for details.) The unit quantity for these variables is velocity.

(in the Phase Interaction... category) is the characteristic time it takes for a particle to reach a steady state. It is calculated as:

(42–37)

where

= relaxation time of dispersed phase

= density of dispersed phase

= diameter of dispersed phase

= viscosity of continuous phase

This item is available only for mixture multiphase cases with the flow regime modeling.

(in the Density... category) is defined as:

(42–38)

where is density. Plots or reports of Rescaled Schlieren include only fluid cell zones. The unit quantity for Rescaled Schlieren is length-inverse.

(in the Density... category) is defined as:

(42–39)

where is density and is velocity. The term provides directional information on the density gradient. yields a positive value in the shock and a negative value in the expansion fan. Therefore, shocks and expansions can be differentiated using the Rescaled Streamwise Schlieren definition. Plots or reports of Rescaled Streamwise Schlieren include only fluid cell zones. The unit quantity for Rescaled Streamwise Schlieren is length-inverse.

contains different quantities for the pressure-based and density-based solvers:

For the density-based solver, by default only the Time Step is available. If you enable the retention of cell residuals (as described in Postprocessing Residual Values), this category also includes​ the residuals of the continuity, momentum, and energy conservation equations. The displayed residuals are defined as the rate of change of the conserved quantity (as described in Monitoring Residuals). They are computed as the summation of the Euler, viscous, and dissipation fluxes divided by the local cell volume. Note that the residuals that are made available for postprocessing are the unscaled values.

For the pressure-based solver, only the Mass Imbalance in each cell is reported (unless you have requested others, as described in Postprocessing Residual Values). At convergence, this quantity should be small compared to the average mass flow rate.

(in the Premixed Combustion... category) is the rate of consumption of species-n due to reverse reactions for scalar in kg/m ³ /s ( in Equation 8–120 in the Fluent Theory Guide). (The name of the PDF scalar will replace PDF scalar-n in Reverse Reaction Rate of PDF scalar-n .)

(in the Species... category) is the root mean square value of the mass of a species per unit mass of the mixture.

(in the Steady Statistics... or Unsteady Statistics... category) is the root mean squared error value of a solution variable n (for example, Static Pressure ). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the Steady Statistics... or Unsteady Statistics... category) is the root mean squared error value of a custom field function cff_n (for example, uns-custom-function-0). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the Steady Statistics... or Unsteady Statistics... category) is the root mean square value of a discrete phase variable n (for example, Volume Fraction). See Performing Steady-State Calculations and Postprocessing for Time-Dependent Problems for details.

(in the NOx... category) is the root-mean-square (RMS) of the normalized temperature in the flow field. It is calculated from Equation 9–113 in the Theory Guide.

(in the Temperature... category) is defined as

(42–40)

where is the enthalpy, is the relative velocity magnitude, and is the magnitude of the rotational velocity .

(in the Phase Interaction... category) is the saturation temperature of the boiling mass transfer mechanism. This item is available for the Eulerian multiphase boiling model only.

(in the Phase Interaction... category) is the saturation temperature of the n^th mass transfer mechanism that you defined. This item is available only for the evaporation-condensation model. See Including Semi-Mechanistic Boiling for more information about the semi-mechanistic boiling model.

(in the Phase Interaction... category) is the saturation vapor pressure for the n ^th cavitation mass-transfer mechanism that you defined.

(in the User Defined Scalars... category) is the value of the ^th scalar quantity you have defined as a user-defined scalar. See the Fluent Customization Manual for more information about user-defined scalars.

(in the Pdf... category) is one of two parameters that describes the species mass fraction and temperature for a laminar flamelet in mixture fraction spaces. It is defined as

(42–41)

where is the mixture fraction and is a representative diffusion coefficient (see The Flamelet Concept in the Theory Guide for details). Its unit quantity is time-inverse.

(in the Premixed Combustion... category) is the mass fraction of the species-n in the PDF mixture that is solved as a transported scalar in the partially-premixed FGM model. (The name of the species will replace species-n in Scalar Mass Fraction of species-n).

(in the Radiation... category) is the property of a medium that describes the amount of scattering of thermal radiation per unit path length for propagation in the medium. It can be interpreted as the inverse of the mean free path that a photon will travel before undergoing scattering (if the scattering coefficient does not vary along the path). The unit quantity for Scattering Coefficient is length-inverse.

(in the Density... category) is defined as:

(42–42)

where is density. Plots or reports of Schlieren include only fluid cell zones. The unit quantity for Schlieren is density-gradient.

(in the Sensitivities... category) This field is available when the Neural Network Model has been applied for turbulence model optimization within the Optimizer Design Variables dialog box, and is the Second Invariant flow feature.

(in the Pdf... category) is the mean ratio of the secondary stream mass fraction to the sum of the fuel, secondary stream, and oxidant mass fractions. It is the secondary-stream conserved scalar that is calculated by the non-premixed combustion model. See Definition of the Mixture Fraction in the Theory Guide.

(in the Pdf... category) is the variance of the secondary stream mixture fraction that is solved for in the non-premixed combustion model. See Definition of the Mixture Fraction in the Theory Guide.

(in the Temperature... category) is available when any of the species models are active and displays only the thermal (sensible) enthalpy.

(in the Sensitivities... category) are the components of the adjoint velocity primitive field. These fields can be interpreted as the magnitude of the sensitivity of the observable to components of a body force per unit volume. Consider a body force distribution, expressed as a force per unit volume. The volume integral of the vector product of that distribution with the components of this field gives a first-order estimate of the net effect of the body force on the observation.

(in the Sensitivities... category) is available when the energy adjoint equation is solved and is defined on walls where a heat flux boundary condition is imposed. The field shows the sensitivity of the observation of interest to variations in the boundary heat flux through the wall. Its properties are analogous to those of Sensitivity to Boundary Temperature.

(in the Sensitivities... category) is defined on boundaries where there is a user-specified pressure as part of a boundary condition, such as on a pressure outlet. The field shows the sensitivity of the observation of interest to variations in the boundary pressure across the flow boundary. It is interesting to note that even though the original boundary condition specification may be for a uniform pressure on the domain boundary, the effect of a non-uniform pressure perturbation is available, The effect of any specific boundary pressure change can be estimated as an integral of the product of the change to the pressure with the plotted sensitivity field. Viewing this field will also indicate whether or not the assumption of a uniform pressure is adequate for the simulation.

(in the Sensitivities... category) is available when the energy adjoint equation is solved and is defined on boundaries where a temperature boundary condition is applied. This includes walls, velocity inlets, mass-flow inlets, pressure inlets, and pressure outlets where a backflow temperature may be specified. The field shows the sensitivity of the observation of interest to variations in the boundary temperature across the boundaries. Note that even if the original boundary condition specification is for a uniform temperature on the boundary, the effect of a non-uniform temperature perturbation is available. The effect of any specific boundary temperature change can be estimated as an integral of the product of the change to the temperature with the plotted sensitivity field. This field can be used to indicate whether or not the assumption of a uniform temperature is adequate for the simulation.

(in the Sensitivities... category) are defined on those boundaries where a user-specification of a boundary velocity is made for the original flow calculation. This includes no-slip walls. The field shows how sensitive the observable of interest is to changes in the boundary velocity at any point. It is interesting to note that even though the original boundary condition specification may be for a uniform velocity on the domain boundary, the effect of a non-uniform velocity perturbation is available, The effect of any specific boundary velocity change can be estimated as an integral of the vector product of the change to the velocity with the plotted sensitivity field. A plot of this quantity on a velocity inlet, for example, can be very useful for assessing whether or not the inlet is positioned too close to key parts of the system. That is, it addresses the question of whether or not the flow domain is too small to achieve a successful computation of the performance measure of interest. Viewing this field will also indicate whether or not the assumption of a uniform inflow is adequate.

(in the Sensitivities... category) This field is available when the turbulence adjoint equations are solved for a case in which the Curvature Correction option is enabled in the Viscous Model dialog box. It is the sensitivity of the observable with respect to the curvature correction parameter, CCURV, which is used to optimize the strength of the curvature correction if needed for a specific flow.

(in the Sensitivities... category) is available when the energy adjoint equation is solved and is the primitive adjoint temperature field. It can be interpreted as the sensitivity of the observable with respect to thermal energy sources or sinks per unit volume in the domain.

(in the Sensitivities... category) is provided as a convenient tool for identifying portions of the flow domain where the introduction of blockages or obstructions in the flow can affect the observation of interest. Consider a blockage in the flow that generates a reaction force on the flow that is proportional to the local flow speed, and acting in the opposite direction to the local flow: where is a local coefficient for the reaction force. The local contribution of this force on the observation of interest is determined by the vector product of this force with the adjoint velocity field. The flow blockage field that is plotted is , namely the negative of the vector product of the flow velocity and the adjoint velocity (Cell Value).

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the blending function, , which is used to deactivate GEKO parameters inside boundary layers.

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the parameter, which is used to optimize strength of mixing in free shear flows.

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the parameter, which is used to optimize flow in non-equilibrium near wall regions (such as heat transfer or ).

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the parameter, which is used to optimize flow separation from smooth surfaces.

(in the Sensitivities... category) is the primitive adjoint pressure field. This field can be interpreted as the sensitivity of the observable with respect to mass sources or sinks in the domain. Consider a mass source / sink distribution, expressed as mass flow rate per unit volume. The volume integral of that distribution, weighted by the local value of this field, gives the effect of the sources / sinks on the observation. When plotted on a boundary, this field indicates the effect of the addition or removal of fluid from the domain upon the quantity of interest. It is important to note that in this scenario the effect of the momentum of the fluid that is added or removed is not taken into account. The boundary velocity sensitivity should be plotted if that effect is also of interest.

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the specific dissipation rate () sources per unit volume in the domain.

(in the Sensitivities... category) is available when the turbulence adjoint equations are solved and is the sensitivity of the observable with respect to the turbulent kinetic energy () sources per unit volume in the domain.

(in the Sensitivities... category) shows the sensitivity of the quantity of interest to variations in the turbulent effective viscosity for a turbulent problem, or the laminar viscosity in a laminar case. The sensitivity is normalized by the cell volume to account for cell size variations in the mesh.

(in the Sensitivities... category) is the magnitude of the sensitivity of the observable with respect to a deformation applied to the mesh (both boundary and interior mesh). When plotted on the surface of a body the locations where this quantity is large indicates where small changes to the surface shape can have a large effect on the observable of interest. If the shape sensitivity magnitude is small then the effect of shape changes in this region can be expected to have a small effect on the observable of interest. When viewing this field, it is often observed that the magnitude varies by many orders of magnitude. Contour plots will clearly draw attention to regions with the highest sensitivity (often sharp edges and corners). However, it should be remembered that a relatively small surface movement that is distributed over a large area can have a cumulative effect that is large.

(in the Sensitivities... category) are the individual components of the sensitivity of the observable of interest with respect to the mesh node locations. It is plotted as cell data and is computed as the average of the nodal sensitivities for a given cell, divided by the cell volume. Note that for this discrete adjoint solver the sensitivity of the result with respect to node locations both on and off boundaries is computed. The normalization by cell volume indicates that the fields that are plotted are the weighting factors for a continuous spatial deformation field. (Note that the nodal sensitivity data itself is used when mesh morphing is performed, and predictions about the effect of shape changes are made.)

(in the Turbulence... category) is the shielding function used as part of the Stress-Blended Eddy Simulation turbulence model and the Shielded Detached Eddy Simulation turbulence model. For details, see Stress-Blended Eddy Simulation (SBES) and Shielded Detached Eddy Simulation (SDES) in the Fluent Theory Guide, as well as Including the SDES or SBES Model with RANS Models.

(in the Structure... category) are the components of the stress tensor. These variables are intended only for solid zones and/or their adjacent walls in intrinsic fluid-structure interaction (FSI) simulations.

(in the Wall Fluxes... category) is a nondimensional parameter defined as the ratio of the wall shear stress and the reference dynamic pressure

(42–43)

where is the wall shear stress, and and are the reference density and velocity defined in the Reference Values Task Page. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the Phase Interaction... category) are the , , and components of the slip velocity vector, which is the difference between velocity vectors of phases and :

(42–44)

Each component of the slip velocity can be postprocessed separately for each phase pair. This item is available only for mixture multiphase cases with the flow regime modeling. For further details, see Flow Regime Modeling in the Fluent Theory Guide.

(in the Wall Fluxes... category) is the nucleate boiling phase heat flux in the semi-mechanistic boiling model. This item is available only when Semi-Mechanistic is selected as the Boiling Model in the Evaporation-Condensation Model dialog box.

(in the Wall Fluxes... category) is the single phase heat flux in the semi-mechanistic boiling model. This item is available only when Semi-Mechanistic is selected as the Boiling Model in the Evaporation-Condensation Model dialog box.

(in the Phases... category) are the components of the volume fraction gradient based on the smoothed volume fraction field. These variables are only available when you enable Surface Tension Force Modeling in the Multiphase Model dialog box (Phase Interaction > Forces tab).

(in the Phases... category) is the magnitude of the smoothed volume fraction gradient. This variable is only available when you enable Surface Tension Force Modeling in the Multiphase Model dialog box (Phase Interaction > Forces tab).

(in the Wall Fluxes... category) is the rate of solar heat transfer through the control surface. Heat flux out of the domain is negative and heat flux into the domain is positive.

contains quantities related to solidification and melting.

(in the Mesh... category) is a measure that indicates the cells that have poor mesh numerics applied to them when the solution and cell quality criterion is enabled; after an iteration is calculated, cells with a criterion value below the threshold (that is, poor cells) and their neighboring cells are assigned a value of 1, whereas all other cells (that is, good cells) are assigned a value of 0.

contains quantities related to the Soot model, which is described in Soot Formation.

(in the Soot... category) is the mass per unit volume of soot. The unit quantity is density. See Fuel NOx Formation in the Theory Guide for details.

(in the Soot... category) is the average diameter of the soot particles. This quantity is available only with the Method of Moments model.

(in the Soot... category) is the total surface area of the soot particles. This quantity is available only with the Method of Moments model.

(in the Soot... category) is the volume fraction of soot.

(in the Properties... category) is the acoustic speed. It is computed from . Its unit quantity is velocity.

(in the Acoustics... category) is the time derivative of the Sound Pressure. It is available only when the acoustics wave equation model is used. Its unit quantity is pressure divided by time.

(in the Acoustics... category) is the acoustic pressure, resulting from the acoustics wave equation. It is available only when the acoustics wave equation model is used. Its unit quantity is pressure.

(in the Acoustics... category) is the acoustic potential, which is a potential of the acoustics particle velocity, resulting from the acoustics wave equation. It is available only when the acoustics wave equation model is used. Its unit quantity is velocity times length.

(in the Acoustics... category) is the marker showing a sponge region of the acoustics wave equation. It is available only when the acoustics wave equation model is used.

(in the Acoustics... category) is the original model source term of the acoustics wave equation, before the application of the time filter. It is available only when the acoustics wave equation model is used. Its unit quantity is square of velocity divided by time.

(in the Acoustics... category) is the marker showing a masking region of the model source term of the acoustics wave equation. It is available only when the acoustics wave equation model is used.

(in the Acoustics... category) is the model source term of the acoustics wave equation, smoothed by the time filter. It is available only when the acoustics wave equation model is used. Its unit quantity is square of velocity divided by time.

(in the Mesh... category) is the normalized (dimensionless) coordinate in the spanwise direction, from hub to casing. Its value varies from to .

(in the Species... category) is the source term in each of the species transport equations due to reactions. The unit quantity is always kg/m ³ -s.

includes quantities related to species transport and reactions.

(in the Turbulence... category) is the rate of dissipation of turbulence kinetic energy in unit volume and time. Its unit quantity is time-inverse.

(in the Properties... category) is the thermodynamic property of specific heat at constant pressure. It is defined as the rate of change of enthalpy with temperature while pressure is held constant. Its unit quantity is specific-heat.

(in the Properties... category) is the ratio of specific heat at constant pressure to the specific heat at constant volume.

(in the Properties... category) is the temperature of the gas phase at which the derivative of pressure with respect to molar volume becomes positive. The spinodal temperature defines the point beyond which the equation of state is no longer valid. If the temperature of your case approaches the spinodal temperature in some regions, this indicates that the flow conditions in these regions probably fall inside the saturation dome. The Spinodal Temperature is available only with the Cubic Equation of State Real Gas models.

(in the Acoustics... category) is the surface pressure level (in decibels) of the standard technical octave band at the octave central frequency x, as calculated by the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for details. Note that the transformation to the decibel units is done by default using the standard acoustic reference pressure value of 2 x 10 ^-5 Pa; you can change this value using the Acoustics Model Dialog Box.

(in the Acoustics... category) is the surface pressure level (in decibels) of the standard technical 1/3-octave band at the 1/3-octave central frequency x, as calculated by the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for details. Note that the transformation to the decibel units is done by default using the standard acoustic reference pressure value of 2 x 10 ^-5 Pa; you can change this value using the Acoustics Model Dialog Box.

(in the Acoustics... category) is the surface pressure level (in decibels) of the user-defined constant band n, as calculated by the Acoustic Sources FFT Dialog Box. See FFT of Acoustic Sources: Band Analysis and Export of Surface Pressure Spectra for details. Note that the transformation to the decibel units is done by default using the standard acoustic reference pressure value of 2 x 10 ^-5 Pa; you can change this value using the Acoustics Model Dialog Box.

(in the Mesh... category) shows how a blending function changes across a sponge layer, where a value of 0 means the solver density is used and a value of 1 means the far-field value is used. For details on sponge layers, see Sponge Layers.

(in the Mesh... category) is the distance from each cell inside a sponge layer to the interior boundary of a sponge layer. It changes linearly from 0 at the interior boundary to the thickness value of the sponge layer at the boundary zone. For details on sponge layers, see Sponge Layers.

(in the Pressure... category) is the static pressure of the fluid. It is a gauge pressure expressed relative to the prescribed operating pressure. The absolute pressure is the sum of the Static Pressure and the operating pressure. Its unit quantity is pressure.

(in the Temperature... and Premixed Combustion... categories) is the temperature in the fluid / solid. Its unit quantity is temperature. For a wall or shadow wall surface, the Static Temperature is the temperature of the adjacent fluid / solid cells; for a shell surface (see Postprocessing Shells), it is the temperature of the shell layer cells on the c0 side (that is, the side closer to the associated wall surface).

Note that Static Temperature will appear in the Premixed Combustion... category only for adiabatic premixed combustion calculations. See Postprocessing for Premixed Combustion Calculations.

includes mean and root mean square error (RMSE) values of solution variables and custom field functions derived from steady state flow calculations (with Data Sampling for Steady Statistics enabled).

(in the Cell Info... category) is an integer identifier designating the partition to which a particular cell belongs. In problems in which the mesh is divided into multiple partitions to be solved on multiple processors using the parallel version of Ansys Fluent, the partition ID can be used to determine the extent of the various groups of cells. The active cell partition is used for the current calculation, while the stored cell partition (the last partition performed) is used when you save a case file. See Partitioning the Mesh Manually and Balancing the Load for more information.

(in the Derivatives... category) relates shear stress to the viscosity. Also called the shear rate ( in Equation 8–36), the strain rate is related to the second invariant of the rate-of-deformation tensor . Its unit quantity is time-inverse. In 3D Cartesian coordinates, the strain rate, , is defined as

(42–45)

For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the Premixed Combustion... category) is the speed of the strained laminar flame inside the domain. The strained laminar flame speed is stored as a function of mixture fraction and strain rate. This item is available only for the partially-premixed FGM model. See Modeling Strained Laminar Flame Speed for more information.

(in the Velocity... category) is formulated as a relation between the streamlines and the statement of conservation of mass. A streamline is a line that is tangent to the velocity vector of the flowing fluid. For a 2D planar flow, the stream function, , is defined such that

(42–46)

constant values of stream function defining two streamlines is the mass rate of flow between the streamlines.

The accuracy of the stream function calculation is determined by the text command /display/set/n-stream-func.

(in the Premixed Combustion... category) is a nondimensional parameter that is defined as the probability of unquenched flamelets ( in Equation 8–83 in the Theory Guide).

(in the Properties... category) has a value of 1 if the flow condition is subcritical and 0 if the flow condition is supercritical and is available with the Cubic Equation of State Real Gas models.

(in the Turbulence... category) is the turbulence dissipation rate of the unresolved eddies, , only active for the LES and Kinetic Energy Subgrid-Scale Model. It is defined as

(42–47)

Its unit quantity is turbulent-energy-diss-rate.

(in the Turbulence... category) is used in the calculation of the subgrid-scale turbulent flux of a scalar . See Equation 4–304 in Subgrid-Scale Models in the Theory Guide.

(in the Turbulence... category) is used in the calculation of the subgrid-scale turbulent flux for Species (see Subgrid Dynamic Prandtl Number).

(in the Turbulence... category) is the Smagorinsky model constant as determined by the dynamic procedure described in Dynamic Smagorinsky-Lilly Model in the Theory Guide). Additional information with respect to the Embedded LES (E-LES) model can be found in Postprocessing for Turbulent Flows.

(in the Turbulence... category) is a mixing length for subgrid scales of the LES turbulence model (defined as in Equation 4–307 in the Theory Guide).

(in the Turbulence... category) is the turbulence kinetic energy per unit mass of the unresolved eddies, , calculated using a transport equation, only active for the LES and Kinetic Energy Subgrid-Scale Model. It is defined as

(42–48)

Additional information with respect to the Embedded LES (E-LES) model can be found in Postprocessing for Turbulent Flows. Its unit quantity is turbulent-kinetic-energy.

(in the Turbulence... category) is the test filter width described in Dynamic Smagorinsky-Lilly Model in the Theory Guide). Additional information with respect to the Embedded LES (E-LES) model can be found in Postprocessing for Turbulent Flows.

(in the Turbulence... category) is the turbulent (dynamic) viscosity of the fluid calculated using the LES turbulence model. It expresses the proportionality between the anisotropic part of the subgrid-scale stress tensor and the rate-of-strain tensor. (See Equation 4–298 in the Theory Guide.) Its unit quantity is viscosity.

(in the Turbulence... category) is the ratio of the subgrid turbulent viscosity of the fluid to the laminar viscosity, calculated using the LES turbulence model.

(in the Turbulence... category) is the turbulence kinetic energy of filtered eddies, , only active for the LES and Kinetic Energy Subgrid-Scale Model. It is defined as

(42–49)

with being the normal components of the Leonard stress.

Its unit quantity is turbulent-kinetic-energy

(in the Acoustics... category) is the Acoustic Power per unit area generated by boundary layer turbulence (see Equation 11–37 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used. Its unit quantity is power per area.

(in the Acoustics... category) is the Acoustic Power per unit area generated by boundary layer turbulence, and represented in dB (see Equation 11–37 in the Theory Guide). It is available only when the Broadband Noise Sources acoustics model is being used.

(in the Radiation... category) is used to view the distribution of surface clusters in the domain. Each cluster has a unique integer number (ID) associated with it.

(in the Species... category) is the rate of ^th solid species consumption/deposition. A positive value indicates corrosion of the solid species on the interface, and a negative value indicates deposition of the solid species.

(in the Species... category) is the amount of a surface species that is deposited on the substrate at a specific point in time.

(in the Species... category) is the amount of a surface species that is deposited on the substrate. Its unit quantity is mass-flux.

(in the Acoustics... category) is the RMS value of the time-derivative of static pressure ( ). It is available when the Ffowcs-Williams & Hawkings acoustics model is being used.

(in the Wall Fluxes... category), as defined in Ansys Fluent, is given by the equation

(42–50)

is the reference temperature defined in the Reference Values Task Page. Note that is a constant value that should be representative of the problem. Its unit quantity is the heat-transfer- coefficient.

(in the Wall Fluxes... category) is the net incoming radiation heat flux on a surface. Its unit quantity is heat-flux.

(in the Wall Fluxes... category) is a local nondimensional coefficient of heat transfer defined by the equation

(42–51)

(in the Wall Fluxes... category) is a nondimensional coefficient of heat transfer defined by the equation

(42–52)

are reference values of density and velocity defined in the Reference Values Task Page, and is the specific heat at constant pressure.

(in the Solidification/Melting... category) is the tangential-direction component of the pull velocity for the solid material in a continuous casting process. Its unit quantity is velocity.

(in the Velocity... category) is the tangential-direction component of the velocity in an axisymmetric swirling flow. See Velocity Reporting Options for details. The unit quantity for Swirl Velocity is velocity. For multiphase models, this value corresponds to the selected phase in the Phase drop-down list.

(in the Wall Fluxes... category) is the swirl component of the force per unit area acting tangential to the surface due to friction. Its unit quantity is that of pressure.

(in the Perforated Walls... category) shows the tagged faces where the injection or extraction conditions are applied. A value of 1 indicates an injection face. A value of -1 indicates an extraction face.

(in the Velocity... category) is the velocity component in the tangential direction. (See Velocity Reporting Options for details.) The unit quantity for Tangential Velocity is velocity.

indicates the quantities associated with the thermodynamic temperature of a material.

(in the Properties... category) is a parameter () that defines the conduction rate through a material via Fourier’s law (). A large thermal conductivity is associated with a good heat conductor and a small thermal conductivity with a poor heat conductor (good insulator). Its unit quantity is thermal-conductivity. Note that when postprocessing solid material properties, the Thermal Conductivity will be displayed as zero if an anisotropic thermal conductivity model is being used for a solid material.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (XX in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic or orthotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (XY in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic or orthotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (XZ in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic or orthotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (YX in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (YY in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic or orthotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.

(in the Properties... category) is a parameter () that defines the conduction rate in the , components (YZ in the global reference frame) of the thermal conductivity of a material via Fourier’s law (). The components of thermal conductivity are only available when anisotropic or orthotropic is selected as the method for specifying Thermal Conductivity for one or more materials in the Create/Edit Materials dialog box.