MRF problem

Amir

Hi,

In my case there is one vertical axis wind turbine consist of 10 vertical blades which is rotating with constant speed.

I placed this turbine inside one cylinder with the same radius as turbine base. I sketched the second cylinder which contains the first one with the same shape but with bigger radius.

these two cylinders are specified as an interior. these two cylinders are specified as one fluid in Gambit and will be specified to rotate with constant speed in Fluent as a MRF.

After running simulation its demonstrated that the inner side cylinder is acting not like an interior.

I need help to understand what the problem is.

I appreciate your concentration.

Regards.