Summary: Modify the change criteria to advance to the next time step.
Flag
AutomaticInnerIteration A
A is the minimum percentage change threshold between inner iterations before progressing to the next time step.
Description
Use this to minimize the number of inner iterations needed to attain a robust solution. This setting can have a significant impact on run times for certain transient scenarios.
The velocity field is checked between inner iterations. When the % difference is less than A %, the solver advances to the next time step. This reduces CPU time and ensures that the momentum equations achieve convergence.
This flag is ideal for transient compressible flow problems (because the overall mass conservation is quite sensitive to inner iteration count).
When invoked, the maximum number of inner iterations per time step is set to 10.
The recommended value is between 3 and 5.