Reply To: Tutorial or Help for 2 way FSI

[Paul Hutcheson]

Again System Coupling is passing displacement from Mechanical to Fluent.

The setting of wall motion sets the velocity of the fluid at the wall mimicking wall motion, not the velocity of the mesh itself. In this case we will move the mesh via System Coupling, so there is no need to set wall motion in Fluent.

In case of the IR, IR is in rotating frame in Mech, so the mesh is not moving tangentially. Therefore we need a wall velocity on fluid side.

In case of the ball, ball is in stationary frame in Mech, so the mesh is moving. Therefore, we need to keep stationary wall on fluid side.

Fluent face zones can’t both be inlet/outlet and periodic no, they are different boundary conditions. If inlet/outlet are also periodic boundaries, then inlet/outlet is not appropriate because they have no relation to each other.