Enters the set solution parameters menu.
Enables a modified NITA scheme and other setting changes that can speed up the simulation. This option is only available with the Large Eddy Simulation (LES) turbulence model, and is intended for unreacting flow simulations that use a constant-density fluid.
Set Error-based adaptive time-stepping parameters.
Sets pressure extrapolations schemes on boundaries.
Set CFL-based adaptive time-stepping parameters.
Enables convergence acceleration for stretched meshes to improve the convergence of the implicit density based solver on meshes with high cell stretching.
Enters the correction tolerance menu.
Sets the fine-grid Courant number (time step factor). This command is available only for the coupled solvers.
Enables data sampling for steady or unsteady flow statistics.
Completely disables reconstruction, resulting in totally first-order accuracy.
Enters the discretization scheme menu. This allows you to select the discretization scheme for the convection terms in the solution equations. The following text commands can make a selection from a subset of the models in the following table:.
Controls whether the output field variabledp-dt will be available for transient simulation postprocessing. If you select no, pressure fields at the previous time steps will not be stored in memory which reduces memory usage.
Sets the order in which the model equations are solved, which can affect the convergence speed when you are using the pressure-based solver. The standard method is enabled by default and corresponds to the ordering shown in and in the Theory Guide; alternatively, you can select theoptimized-for-volumetric-expansion method, which is recommended for flows in which the density is strongly dependent on thermal effects, chemical composition, and so on (such as combustion simulations). This text command is not available for steady simulations and/or when a multiphase model is enabled.
Selects the equations to be solved.
Sets expert options.
Specifies whether or not to print warning messages when reversed flow occurs at inlets and outlets, and when mass-flow inlets develop supersonic regions. By default, flow warnings are printed.
Enter the flux type.
Sets gradient options.
Sets the heterogeneous stiff-chemistry solver.
Specifies whether or not to print warning messages when quantities are being limited. By default, limiter warnings are printed.
Sets solver limits for various solution variables, in order to improve the stability of the solution.
Specifies whether you want to lock (or “freeze”) the temperature values for all the cells in solid zones (including those to which you have a hooked an energy source through a UDF) and in walls that have shell conduction enabled, so that the values do not change during further solver iterations.
Control the display of material property warning diagnostics: 0 - off (no messages) 1 - messages per material 2 - messages per material and per property.
Enters the max-corrections menu.
Transient options for sliding, moving, and/or dynamic mesh.
Sets anisotropic drag parameters for the Eulerian multiphase model.
Sets the reference density method for the Eulerian multiphase model. The following options are available: 0 (default): Averaged density of the phase 1: Cell density of the phase 1: Constant value of 1 1: Cell density of the phase See for more information.
Sets the parameters that govern the algebraic multigrid procedure.
Sets multigrid parameters and termination criteria.
Sets the parameters that control the FAS multigrid solver. This command appears only when the explicit coupled solver is used.
Sets the multi-stage coefficients and the dissipation and viscous evaluation stages. This command appears only when the explicit coupled solver is used.
Switches between the modified treatment of node-based gradients at boundary cells and the legacy treatment (R14.5.7 and earlier). If using the density-based solver, you can also specify the extended treatment. For details, see .
Sets the number of iterations for a steady-state simulation without starting the calculation.
Sets damping function in flow direction. This command appears only when the VOF model is enabled. Select the damping function to be used: Index Damping Function 0 Linear 1 Quadratic 2 Cubic 3 Cosine.
Sets numerics options.
For flows that do not transition from sub-critical to super-critical, or vice-versa, you can speed-up the solution calculation by updating the frequency of Froude number during run time.
Sets pressure-velocity controls.
Set advanced pressure-velocity coupling controls.
Selects which pressure-velocity coupling scheme is to be used. Five schemes are available:.
Sets phase based slope limiter for VOF compressive scheme.
Enables the species reaction sources and sets relaxation factor.
Enable Reduced Rank Extrapolation method to accelerate solution time.
Reduced Rank Extrapolation options.
Enters the relaxation-factor menu.
Sets the solver relaxation method.
Sets the number of iterations for which convergence monitors are reported. The default is 1 (after every iteration).
Sets the implicit residual smoothing parameters. This command is available only for the explicit coupled solver.
Enters the residual tolerance menu.
Sets the amount of residual information to be printed. A value of 0 (the default) prints residuals at the end of each fine grid iteration. A value of 1 prints residuals after every stage of the fine grid iteration. A value of 2 prints residuals after every stage on every grid level.
Enables / disables the variable time step size formulation for second-order implicit transient formulations. If you disable the variable time step size formulation, note that any change in the time step size will introduce an error proportional to the change in the time step size ratio.
Sets all species discretizations and URFs together.
Sets controls to default values.
Sets the solution methods to the default settings.
Sets solution steering parameters.
Selects a new Fluent solver slope limiter.
Enables solution steering for the density-based solver.
Sets solver options for stiff chemistry solutions.
Sets surface-tension calculation options.
Set surface-tension expert options.
Set the time step.
Enters the under-relaxation menu, which allows you to set the under-relaxation factor for each equation that is being solved in a segregated manner.
Set Multiphase-Specific Adaptive time stepping parameters.
Sets the sub time step calculation method for VOF calculations.
Sets VOF numeric options.