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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Two-way FSI: excessive thickness change › Reply To: Two-way FSI: excessive thickness change

January 3, 2025 at 4:37 pm
Rahul Mule
Ansys Employee

This suggests that despite your efforts so far the motion is still numerically unstable. Try even smaller time steps.

Also, check if the QN-stabilization option helps. With this option make sure you set enough coupling iterations that the coupled step converges.