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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

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.