Hi Rob,
Thank you for answering my queries.
The first two figures are velocity contours in a quadrant formed by X=0,Y=0 and Z=50 m planes and inner rotating domain. First figure has rotating domain inner interface and second figure has rotating domain outer interface. The velocity magnitude at the sharp edges of rotating domain are different for inner and outer interface. Is this only the transient condition, or the one causing the real problem because of incorrect flux transfer between inner and outer domain? If so, how can I make interface better?
The another figure is of turbulent viscosity ratio on same plane.
I could actually increase the limiting value of viscosity ratio, but I read somewhere that the flow causing this kind of viscosity is unreal. I can be wrong. I will increase the limit and try the simulation once.