Fluid-Solid Interaction

[zartan]

When you perform a FSI analysis by the Sequential Weak Coupling Analysis method (flagging FSI, and setting the number of stagger iterations, etc) rather than specifying physics environments is ANSYS supposed to conform the fluid flow to the deformed shape? From what I've read it seems like it should. But, I haven't been able to see that result. The flow seems to act as if the shape hasn't changed at all. Is there something I'm missing here? I thought I went through the analysis correctly. Any help would be great. Thanks.

Z

 

[BWT]

Z -

I believe the mesh should conform for either the SWC or SCP approach. But in either case, you must activate the mesh morphing (using ALE option in the FLDA,SOLU,ALE command - I think). Also, I think this feature can only be used with FLUID141 and 142 elements. Finally, if you turn ALE on, you must specify this in the element KEYOPT (4, I think for those elements).

This is all in the manual, but as per ANSYS company policy its written in the most disjointed and ambiguous way possible.

Hope this helps.

-BWT