Reply To: Tutorial or Help for 2 way FSI

[Paul Hutcheson]

The remote displacement on the ball should have UX,UY,UZ,RX,RY=0 and only RZ free.

-> It is very easy for me to lose track of the setup you have supporting you in this way. Please make sure you are solving both CFD and Mechanical in a rotating reference frame, and adjust all boundary conditions at walls accordingly.

To calculate the ball torque, firstly create a cylindrical coordinate system in Fluent, then calculate the moment about z axis. This is the torque.

In Mechanical you can calculate the rotational z displacement once you have a cylindrical coordinate system in Mechanical.

Paul