• Steady State Simulation—Neglects the effects of time. Transient processes, like centrifugal impeller, are approximated as a time-averaged, steady state process using the moving reference frames. The following settings are available in the Properties panel when you set Time Definition to Steady State Simulation.

◦ Number of Iterations—Point at which the code stops (Steady) or moves to the next time step (Transient). Number of iterations should be sufficiently large to allow the Converge Criterion for all modules to be satisfied.

◦ Time Definition—Allows you to set the simulation as Steady State Simulation.

◦ Result Saving Frequency—Generates a results file Filename.sres when the run is completed. Depending on the value for Result Saving Frequency, the same result file is overwritten.

◦ Mesh Update Frequency(Iterations)—Determines the frequency (number of iterations) to update the mesh.

◦ Additional Output Files—Provides the options of No Other Outputs or an output in EnSight Format.

• Transient Simulation—Includes the effects of time. Examples of transient problems are those with time varying boundary conditions, moving parts, or instabilities, which can only be solved using the Transient option. The following settings are available in the Properties panel when you set Time Definition to Transient.

◦ Number of Iterations—Point at which the code stops (Steady) or moves to the next time step (Transient). Number of iterations should be sufficiently large to allow the Converge Criterion for all modules to be satisfied.

◦ Time Definition—Allows you to set the simulation as Transient and provides the following options:

▪ Simulation Time (Duration)—Duration, in seconds, of a transient simulation. The simulation time combined with the number of time steps determines the size of the time steps.

◦ Result Saving Frequency—Determines the frequency of the output of the results file .sres and controls the output frequency for Additional Output Files.

◦ Cycle Computation Interval—Determines the frequency (time steps) to update the mesh.

◦ Additional Output Files—Provides the options of No Other Outputs or an output in EnSight Format.