Reply To: Tutorial or Help for 2 way FSI

[Paul Hutcheson]

Thanks for the pictures. Why do you have an inlet and outlet there? Isn't the flow driven by IR rotation? Rotational periodic boundaries would be better in that case.

Please search the help manual to familiarise yourself with these concepts:

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v242/en/flu_ug/flu_th_sec_srf_fjk.html?q=frame%20motion

Frame motion is under cell zone conditions for the fluid zone.

I see you do have a wall representing the ball, so you can calculate the torque on it.

If you solve in a rotating frame, make sure the wall boundary conditions are correct for that frame. E.g. the IR will now be stationary relative to adjacent cell zone, and OR will be counter-rotating with IR velocity relative to adjacent cell zone, or stationary in absolute frame.