[peter.pan]

Hi,

I am trying to model a 2D rotating flow in a square domain (constant omega, rotation axis: center of the square domain). While doing steady state modeling, I get a typical solid body rotation which is expected but while I do transient case modeling-(to capture the impulsively started motion effect), I end up with the same result after sufficient iterations. While I can infer that the solution reaches a steady state case, is there a way I can capture the transient case phenomena. Should I reduce the time steps to see the effects or is there any other scheme in FLUENT to solve such a problem.

Also for time independency, will I need to reduce the time steps and look at the results and if there isnt much change between two sets of time steps, I may infer time independency for the current mesh regime. Is this a good way to go about it?

Also for the rotating domain, what approach for implementing the rotation would be best suited? Having reference frame motion and wall motion as 'relative velocity=0' about the same point of rotation or just having wall motion and unchecking the no slip condition?