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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Fluid Cavity not moving with the Solid Domain › Reply To: Fluid Cavity not moving with the Solid Domain

February 21, 2022 at 12:06 pm
Rob
Forum Moderator
The residuals look very transient - are you solving transient or steady? For moving mesh it should be the former, and check each time step converges.
The viscosity ratio can be linked to poor mesh, but is more often down to boundary conflicts or domain scale. The former is where you set a very high (or low) value for k, e, intensity etc which the solver finds to not tie up with the flow field. The latter is for very big domains where the size of the turbulent eddies give high turbulent viscosity.
Check plots of k, e, w etc to see what's going on.