toroidal simulation
 

Hi everyone,
I'm new in Fluent and I want to simulate a tour (circular closed pipe)(attached picture). This simulation should transient any worked before on something like that?
I need to start my simulation by constant angular velocity, before that, I need to try UDF for the inlet velocity to be a ramp.
I almost have all the inputs except the UDF so I need to try first by the constant velocity.
I need to test the convergence.
I need to do the post-processing for the results.