Reply To: 2 way coupled FSI for ball bearing

[Rahul]

Same problem? negative volume error or inner race not moving correctly?

As you have a very small gap between the race and the ball, it makes the setup difficult. Also, the mesh is moving in that zone, so it must be handled very carefully. 

This setting specifies the minimum distance to be maintained between the faces of the moving bodies equal to the current gap size. This will prevent the fluid mesh from collapsing by preventing the ball from interpenetrating the race (you can try specifying the offset = gap size).

Here Fluid flow(CFX) uses the CFX solver

         Fluid Flow(Fluent with Fluent Meshing) uses the Fluent solver and Fluent Meshing mesher is used to mesh the geometry

         Fluid Flow(Fluent) uses the Fluent solver and geometry is meshed with Ansys WB Mesher

         Fluid Flow(Polyflow) is not for case.

You can use Fluid Flow(Fluent with Fluent Meshing) or Fluid Flow(Fluent).