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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › High Mach number and Linear solver overflow fatal error › Reply To: High Mach number and Linear solver overflow fatal error

November 15, 2023 at 3:26 pm
Federico
Ansys Employee

Is this steady or transient case? You mention physical time step.

If the interactions between stationary and rotating components are significant, I would recommend switching to sliding-mesh model. Although, you may still want to get a stable solution with MRF as your initial solution.