Hello Caleb,
What are you looking for? What kind of results? If the rigid plate is fully constrained and does not move, why not have a boundary in the fluid domain to represent the rigid plate?This way you wouldn't need to do an FSI simulation and you would avoid this problem.
For example, this cylinder flow example; the cylinder is not meshed; only the boundary is included:
https://www.dynaexamples.com/icfd/basics-examples/cylinder_flow
Let me know if this helps or not.
Reno.
You are navigating away from the AIS Discovery experience