16.4. Miscellaneous Variables

Note:  Variables with names shown in bold text are not output to CFD-Post. However, some of these variables can be output to CFD-Post by selecting them from Extra Output Variables List on the Results tab of the Solver > Output Control details view of CFX-Pre.

In the Availability column:

  • A number represents the user level (1 indicates that the variable appears in default lists, 2 and 3 indicate that the variable appears in extended lists that you see when you click  )

  • A indicates the variable is available for mesh adaption

  • C indicates the variable is available in CEL

  • DT indicates the variable is available for data transfer to Ansys

  • M indicates the variable is available for monitoring

  • P indicates the variable is available for particle user routine argument lists

  • PR indicates the variable is available for particle results

  • R indicates the variable is available to be output to the results, transient results, and backup files

  • RG indicates the variable is available for real gases

  • TS indicates the variable is available for transient statistics

Long Variable Name

Short Variable Name

Units

Availability

Definition

Aspect Ratio

aspect ratio

[ ]

 

2

C, M, R, TS

 

Autoignition

autoignition

[ ]

1

A, C, M, R, TS

 

Boundary Scale

bnd scale

[ ]

3

C, M, R, TS

Similar to wall scale, this variable is used for controlling mesh stiffness near boundaries for moving mesh problems.

Burnt Absolute Temperature

burnt Tabs

[K]

2

A, C, M, R, TS

 

Burnt Density

burnt density

[kg m^-3]

2

A, C, M, R, TS

 

Clipped Pressure

pclip

[Pa]

1

M, R, TS

Negative absolute values clipped for cavitation

Conservative Size Fraction

sfc

[ ]

2

A, C, M, R, TS

 

Courant Number

courant

[ ]

2

C, M, R, TS

 

Cumulative Size Fraction

csf

[ ]

2

A, C, M, R, TS

 

Current Density

jcur

 

1

C, M, R, TS

 

Dynamic Diffusivity

diffdyn

 

2

C, M, P, R, TS

 

Electric Field

elec

 

1

C, M, R, TS

 

Electric Potential

epot

 

1

C, M, R, TS

 

Electrical Conductivity

conelec

 

3

C, M, R, TS

 

Electrical Permittivity

permelec

 

3

C, M, R, TS

 

Electromagnetic Force Density

bfemag

 

3

R

 

Equivalence Ratio

equivratio

[ ]

2

A, C, M, R, TS

 

External Magnetic Induction

bmagext

[ ]

1

M, R, TS

External magnetic induction field specified by the user.

First Blending Function for BSL and SST model

sstbf1

[ ]

3

C, M, R, TS

 

Second Blending Function for SST model

sstbf2

[ ]

3

C, M, R, TS

 

Flame Surface Density

fsd

[m^-1]

1

A, C, M, R, TS

Combustion with flame surface density models.

Specific Flame Surface Density

spfsd

 

2

A, C, M, R, TS

Combustion with flame surface density models.

Frequency

freq

 

3

C

 

Fuel Tracer

trfuel

[ ]

1

A, C, M, R, TS

Residual material model or exhaust gas recirculation (EGR)

Granular Temperature

grantemp

[m^2 s^-2]

1

A, C, M, R, TS

 

Group I Index

groupi

[ ]

2

C

 

Group J Index

groupj

[ ]

2

C

 

Group I Diameter

diami

 

2

C

 

Group J Diameter

diamj

 

2

C

 

Group I Mass

massi

 

2

C

 

Group J Mass

massj

 

2

C

 

Group I Lower Mass

massi lower

 

2

C

 

Group J Lower Mass

massj lower

 

2

C

 

Group I Upper Mass

massi upper

 

2

C

 

Group J Upper Mass

massj upper

 

2

C

 

Ignition Delay Elapsed Fraction

ignfrc

[ ]

2

A, C, M, R, TS

 

Ignition Delay Time

tigndelay

[s]

2

A, C, M, R, TS

 

Particle Integration Timestep

particle integration timestep

[s]

3

P

 

Isentropic Compressibility

compisoS

[m s^2 kg^-1]

 

2

C, M, R

Isentropic Compression Efficiency

icompeff

[ ]

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Isentropic Expansion Efficiency

iexpeff

[ ]

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Isentropic Total Enthalpy

htotisen

 

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Isentropic Static Enthalpy

enthisen

 

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Isobaric Compressibility

compisoP

[K^-1] 

2

C, M, R

Isothermal Compressibility

compisoT

[m s^2 kg^-1]

2

C, M, R

LES Dynamic Model Coefficient

dynmc

[ ]

1

A, C, M, P, R, TS

 

Laminar Burning Velocity

velburnlam

[m s^-1]

2

A, C, R, TS

 

Lighthill Stress

lighthill stress tensor

 

2

A, C, M, R, TS

 

Magnetic Induction

bmag

 

1

C, M, R, TS

 

Magnetic Field

hmag

 

2

C, M, R, TS

 

Magnetic Vector Potential

bpot

 

1

C, M, R, TS

 

Magnetic Permeability

permmag

 

3

C, M, R, TS

 

External Magnetic Induction

bmagext

 

1

C, M, R, TS

 

Mass Flux

mfflux

 

2

R

 

Mesh Diffusivity

diffmesh

[m^2 s^-1]

2

C, M, R, TS

 

Normal Area

normarea

[ ]

2

C

Normal area vectors.

Total Force Density

forcetden

 

3

DT

 

Total Pressure in Rel Frame

ptotrel

 

2

A, C, M, P, R, TS

Based on relative frame total enthalpy.

Turbulent Burning Velocity

velburnturb

[m s^-1]

2

A, C, R, TS

 

Mesh Velocity

meshvel

 

1

C, M, R, TS

 

Mixture Fraction Scalar Dissipation Rate

mixsclds

[s^-1]

3

A, C, M, R, TS

 

Molar Reaction Rate

reacrate

 

2

C, R, TS

 

Nonclipped Absolute Pressure

pabsnc

 

3

A, C, M, R, TS

Nonclipped absolute pressure for cavitation source. This is written to the .res file for all cases that have cavitation.

Nonclipped Density

densitync

[kg m^-3]

2

C

Nonclipped density for cavitation source

Normal Vector

normal

[ ]

2

C

 

Orthogonality Factor Minimum

orthfactmin

[ ]

2

C, M, R, TS

 

Orthogonality Factor

orthfact 

[ ]

2

C, M, R, TS

 

Orthogonality Angle Minimum

orthanglemin

 

2

C, M, R, TS

 

Orthogonality Angle

orthangle

 

2

C, M, R, TS

 

Particle Laplace Number

ptla

[ ]

2

P

 

Particle Turbulent Stokes Number

ptstt

[ ]

2

P

 

Polytropic Compression Efficiency

pcompeff

[ ]

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Polytropic Expansion Efficiency

pexpeff

[ ]

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Polytropic Total Enthalpy

htotpoly

 

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Polytropic Static Enthalpy

enthpoly

 

2

C, M, R, TS

Available only when used in a built-in efficiency calculation; otherwise unavailable due to lack of association with an inlet/outlet.

 

Reaction Progress

reacprog

[ ]

1

A, C, M, R, TS

For premixed or partially premixed combustion.

Weighted Reaction Progress

wreacprog

[ ]

2

A, C, M, R, TS

For premixed or partially premixed combustion.

Weighted Reaction Progress Source

wreacprogsrc

 

3

A, C, R, TS

For premixed or partially premixed combustion.

Residual Products Mass Fraction

mfresid

[ ]

1

A, C, M, R, TS

Residual material model or exhaust gas recirculation (EGR)

Residual Products Molar Fraction

molfresid

[ ]

2

A, C, M, R, TS

Residual material model or exhaust gas recirculation (EGR)

Restitution Coefficient

restitution coefficient

[ ]

3

C, M, R, TS

 

Rotation Velocity

rotvel

 

2

C, R, TS

 

Rotational Energy

rotenergy

 

2

C, R, TS

 

Shear Velocity

ustar

 

2

C

 

Size Fraction

sf

[ ]

1

A, C, M, R, TS

 

Solid Bulk Viscosity

solid bulk viscosity

[kg m^-1 s^-1]

3

C, M, R, TS

 

Solid Pressure

solid pressure

[Pa]

3

A, C, M, R, TS

 

Solid Pressure Gradient

solid pressure gradient

[ ]

3

C, M, R, TS

 

Solid Shear Viscosity

solid shear viscosity

[kg m^-1 s^-1]

3

C, M, R, TS

 

Spinodal Pressure

pspin

[Pa]

RG

Metastable condition boundary

Spinodal Temperature

tspin

[K]

RG

Metastable condition boundary

Static Entropy

entropy

 

3

A, C, M, P, R, TS

 

Temperature Variance

Tvar

 

1

A, C, M, R, TS

 

Time This Run

trun

 

2

C

 

Total Boundary Displacement

bnddisptot

 

1

C, DT, M, R, TS

 

Total Density

dentot

[kg m^-3]

2

A, C, M, R

Total Density is the density evaluated at the Total Temperature and Total Pressure.

Total Density in Stn Frame

dentotstn

[kg m^-3]

2

A, C, M, R

 

Total Density in Rel Frame

dentotrel

[kg m^-3]

2

A, C, M, R

 

Total Force

forcet

 

3

DT

 

Unburnt Absolute Temperature

unburnt Tabs

[K]

2

A, C, M, R, TS

 

Unburnt Density

unburnt density

[kg m^-3]

2

A, C, M, R, TS

 

Unburnt Thermal Conductivity

unburnt cond

[W m^-1 K^-1]

2

A, C, M, R, TS

 

Unburnt Specific Heat Capacity at Constant Pressure

unburnt Cp

[J kg^-1 K^-1]

2

A, C, M, R, TS

 

Volume Porosity

volpor

[ ]

2

C, M, R, TS

 

Volume of Finite Volumes

volcvol

 

3

C, R, TS

 

Vorticity

vorticity

 

2

A, C, M, R, TS

Note that Vorticity is the same as Velocity.Curl. 

Vorticity in Stn Frame

vortstn

 

2

A, C, M, R, TS

 

Wall External Heat Transfer Coefficient

htco

 

2

R, TS

 

Wall Adjacent Temperature

tnw

[K]

2

C, DT, R, TS

 

Wall Distance

wall distance

[m]

2

A, C, M, P, R, TS

 

Wall External Temperature

tnwo

[K]

2

DT, R, TS

User-specified external wall temperature for heat transfer coefficient boundary conditions.

Wall Film Thickness

film thickness

[m]

2

C, R

 

Wall Heat Transfer Coefficient

htc

 

2

C, R, TS

 

Wall Heat Flow

QwallFlow

 

3

C, DT, R, TS

 

Wall Normal Velocity

nwallvel

 

2

C, R, TS

 

Wall Scale

wall scale

 

3

R, M, TS

 

Wavelength in Vacuum

wavelo

 

3

C

 

Wavenumber in Vacuum

waveno

 

3

C

 

Normalized Droplet Number

spdropn

[m^-3]

2

C, M, R, TS

 

Droplet Number

spdrop

 

1

C, M, R, TS

 

Dynamic Bulk Viscosity

dynamic bulk viscosity

 

1

A, C, M, R, TS

 

Total MUSIG Volume Fraction

vft

[ ]

2

A, C, M, R, TS

 

Smoothed Volume Fraction

vfs

[ ]

2

A, C, M, R, TS

 

Temperature Superheating

Tsuperheat

 

3

C

Temperature above saturation

Temperature Subcooling

Tsubcool

 

3

C

Temperature below saturation