Selected VariablesSelected vertex fields are written to the results file. The fields are chosen from the Output Variables List. No clean restart is possible from these files.
Boundary Only(available only on the Trn Results tab)The selected transient results are written only to the vertices on the boundaries, reducing the size of each .trn file but also restricting the variable data available for postprocessing to that on the boundaries. Interior data will be undefined and, as such, this option is not recommended for postprocessing moving mesh simulations. Where available, hybrid data from each requested variable will be written, otherwise conservative values will be used. Data is not exported on symmetry boundaries or 1:1 periodic interfaces.
Smallest(not available on the Results tab)Mesh data and all solution vertex fields are written. A restart is possible from these files, but the restart will not be clean (you can expect a temporary increase in residual values).
EssentialThe smallest file that preserves a clean restart is written. This includes data written in the Smallest category and the following:
GGI control surface fields
Boundary face solution arrays
Mass flow data fields
StandardThis contains data written in the Essential category and the following:
Hybrid fields
Postprocessing fields
Solver MonitorOnly the data needed to monitor a run, such as residuals and monitor data, are written to the results file. No mesh data or solution vertex fields are written. This option can be used, for example, to build an operating map without having to retain numerous results files.
NoneUsed when no output of results is required (for example, during solver performance benchmarking).
NoneThis offers no compression.
DefaultThis is a compromise between disk space and processing load.
Best Speed Least CompressionLow Speed Most Compression
You may want to increase the compression level for large backup files, or if you do not have much disk space.
Allows you to select the output variables to write to the results
file. Select the desired variables from the list or click the 
icon to select from a list of all variables. Output Variable List is available only when the option
is set to Selected Variables or Boundary
Only.
Adds the mesh to the output.
When Include Mesh is selected, the mesh data will be written to the results file. Using the Include Mesh option will enable postprocessing of the results file and will make restarting possible.
This check box determines whether the File Format setting will be specified,
or left at the solver default value: CFX Native.
The File Format options are:
CFX NativeThe CFX-Solver writes a .res file, or, for multiple-configuration or operating point cases, an .mres file plus multiple .res files.
Common Fluids FormatThe CFX-Solver writes Common Fluids Format (CFF) files and, for monitoring operations in the CFX-Solver Manager, a minimal .res file of type
Solver Monitor.Note that neither the CFF nor .res file written using this option contains sufficient information for a restart.
CFX Native and Common Fluids FormatThe CFX-Solver writes a .res file and CFF files.
CFF files are written as a set of case and data files in the run directory, plus a fluids project file (.flprj) that references the set. The CFF case and data files have extensions .cas.cff and .dat.cff, respectively.
CFF files are for post-processing outside of CFD-Post. CFX-Solver has limitations for writing CFF files. Consequently, if you are planning to load results from CFX into CFD-Post, it is generally better to load .res or .mres files than to load CFF files.
Note that the CFX-Solver cannot write CFF files for cases that involve:
Multiple-configuration
Operating points
Particles
Radiation
Transient Blade Row
Note that there are limitations on the data that CFX-Solver can write to CFF files. The following data is not written:
Hybrid values, mass flow values, and any solution variables that are not located at mesh vertices
Profile data that is held in an external file
Solution residual and monitor data
Boundary-only variables
Boundary-only transient results
The domain-specific reference pressure and the value of expert parameter
include pref in forces, which could have been used to include reference pressure effects in force calculationsInformation needed to support relative coordinate frames (see Reference Coord Frame).
When Output Equation Residuals is set to All, the equation residuals for all equations are written
to the results file for steady-state solutions. The residuals can
then be viewed in CFD-Post. They appear as ordinary variables available
from the full list of variables. This parameter replaces the expert
parameter output eq residuals.
When Output Boundary Flows is set to All, equation flows, including mass flows, are written
to the file you have set up. These flows enable accurate evaluations
of forces, heat flows, and mass flow related calculations in CFD-Post.
These flows are always written for Standard backup/results
and transient files. They are not written for Selected Variables and Smallest transient files,
unless Output Boundary Flows is set to All.
This check box is available for results, backup results, and transient results, when using one of the following
options: Selected Variables, Smallest, and Essential.
Selecting this check box exposes the Output Variable Operators setting, which can have a value of All or None.
Setting the value to All causes the applicable output file to include all available operators that the solver has
calculated (for example, gradients, High Resolution betas) for the
variables listed under Output Variables List or Extra Output Variables List.
For the Standard option, the Output Variable Operators check box is not shown and all available operators are written.
Note: Transient statistics are not written for Selected Variables or Smallest results, backup results, or transient results,
unless Output Variable Operators is set to All.
For cases with particles, when Output Particle Boundary Vertex Fields is selected, the following boundary vertex fields are written:
Inlets, outlets, openings and interfaces:
Mass flow density
Momentum flow density
Energy flow density
Walls:
Mass flow density
Stress
Erosion rate density.
For transient cases, the following additional boundary vertex fields are written:
Inlets, outlets, openings and interfaces:
Time integrated mass flow density
Time integrated momentum flow density
Time integrated energy flow density
Walls:
Time integrated mass flow density
Time integrated erosion rate density.
For additional details, see Particle Boundary Vertex Variables in the CFX Reference Guide
This determines how often backup and transient results files are written during a run.
Enter a number that specifies the number of timesteps between the writing of each results file.
Enter a comma-separated list of timestep numbers that specifies the timesteps at which files are written.
Enter a number that specifies the simulation time interval between the writing of each file. The simulation time interval is added to a running total that starts at the simulation start time. An iteration within half a timestep of the current total has a file written.
Enter a comma-separated list of simulation times that specifies the iterations at which files are written.
No further input is needed. A backup or transient results file is written for every timestep in a transient simulation.
No further input is needed. A backup or transient results file is written for every iteration.
Enter a number that specifies the number of iterations between the writing of each file.
Enter a comma-separated list of iteration numbers that specifies the iterations at which files are written.
(Only available for backup files)
Enter a number that specifies the wall clock time interval between the writing of each backup file.
This is used to create backup files every so often in real time. For example, on an overnight simulation you might choose to have a backup file created every two hours, regardless of how many iterations or timesteps had been performed.