Training Guide > Multi-Phase Flow Tutorials > Cavitation Tutorial > Setting Solver Parameters and Stopping Criteria
Setting Solver Parameters and Stopping Criteria
As we are solving an unsteady problem, it is necessary to specify the time-step size and the elapsed simulation time. This calculation will run for 5 x 10-5 s with a time-step size of 10-7 s, so will require 500 time steps.
To specify the step size:
- Select the Solvers > Implicit Unsteady node.
- In the Properties window, change the Time-Step property to
1e-7 s.
- To set the run time, select the Stopping Criteria > Maximum Physical Time node.
- In the Properties window, set the Max Physical Time property to
5e-5 s.
The number of inner iterations per time step is set to 20 by default. This is more than is necessary for this simulation so the value may be reduced.
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