Single reference frame
 

I am Modeling a simple asymmetric flow using single reference frame motion. I've got my design right. Now I just want to see the effects at different rotation speeds. I tried making the frame rotation about the axis. The solution I am getting looks quite incorrect. I am starting at very low rotation speeds so the flow should barely be effected. i just want to know if making the rotating frame is the correct way or should I make all the walls rotate with respect to the absolute frame of reference?
Any input will help.
Thank you for your time