Moving Reference Frame.
 

HI,

I am confused regarding a problem that has a rotating solid part and water (fluid domain) flowing over it.
I have taken solid as a separate zone and there is an interface between the solid and the fluid region. I have given a zone rotation for the solid using Frame motion. But its not working. Problem solves when I give wall motion instead.

Please help me with the problem regarding MRF.

Thanks in advance!

You should be careful about rotation axis and origin. You may as well try transient simulation. Also you need to set your wall as moving rotating as your domain and axis origin must be same as your domains.