I'm doing a CFD analysis on a shrouded wind turbine. First of all I studied the bare wind turbine and to extrapolate the value of the torque I created two domains: one was an external domain and the other was a rotating domain that takes inside also the turbine.
Now I have to study if the duct can increase the torque of my turbine. First of all I created the external domain but now I don't know how to created a rotating domain around the turbine without including the duct.. I don't want to put in movement the duct.
I attach a screenshot of my geometry.
Thank you very much for your help,