Solve/Controls/Multi-Stage... menu item opens the
Multi-Stage Parameters panel. It is available only when the density-based explicit solver is used.
Multi-Stage Parameters Panel
Multi-Stage Parameters panel allows you to set parameters that govern the operation of the multi-stage solver. See Section
25.13 for details about the items below.
Number of Stages
is the number of stages used in the multi-stage scheme. The default scheme is a 3-stage scheme with coefficients of 0.2075, 0.5915, and 1.0 for the first through third stages, respectively. Although the panel limits the maximum number of stages to five, you can define a scheme with an arbitrary number of stages with the
solve/set/multi-stage text command.
labels the stage to which the parameters in the other columns apply.
sets the multi-stage coefficient for each stage. Coefficients should be greater than zero and less than one. The final stage should always have a coefficient of 1.
sets the stages for which artificial dissipation is evaluated. If a
Dissipation box is selected for a particular stage, artificial dissipation will be updated on that stage. If not selected, artificial dissipation will remain "frozen'' at the value of the previous stage.
sets the stages for which viscous stresses are evaluated. If a
Viscous box is selected for a particular stage, viscous stresses will be updated on that stage. If not selected, viscous stresses will remain "frozen'' at the value of the previous stage. Viscous stresses should always be computed on the first stage, and successive evaluations will increase the "robustness'' of the solution process, but will also increase the expense (i.e., increase the CPU time per iteration). For steady problems, the final solution is independent of the stages on which viscous stresses are updated.
sets the fields to their default values, as assigned by
FLUENT. After execution, the
Default button becomes the
resets the fields to their most recently saved values (i.e., the values before
Default was selected). After execution, the
Reset button becomes the