FSI on a Rotating Structural Model

drgolf

I have an interesting FSI problem. I have an interesting FSI problem. I have a rotating shaft with blades on the end. The blades are non-symmetric so the shaft "whirls". I am trying to perform a FSI analysis on this model. The problem is once the structural model rotates, the FSI crashes.

I have been able to model in CFX by itself the effect of rotation by using a rotating domain where the shaft/blades in a rotating reference frame and the wall is "counter-rotating". I have also used a stationary domain an imposed a rotating boundary condition on the shaft/blades.

So, I am wondering how to get this type of problem to work when I add a rotating structural model and perform an FSI analysis. Is there some way to get the CFX mesh to rotate with the structural model during the transient run? Is there a way to perform a coordinate transformation on the structural model after rotation and input those coordinates into CFX every time step? Any suggestions?