[esp-m1000]

Hi to all,
This is my first topic but I read the forum for some years...
I'm doing CFD analisys for my thesis at university on a Vertical Axis Wind Turbine.
I have designed and meshed a 3D vertical axis wind turbine with 5 blade on gambit.
I have done two different fluid zones in the mesh one for free flow and one in agreement with the turbine .
Now I have done some simulation on fluent, but the first problem is that after about 2500 iterations the residuals don't converge but become flat (can i assume the the solution is good?), maybe this is caused from the contidions I set.
The second problem is that I use a Multiple rotating reference frames, so I must set the angular velocity of blades and mesh.
I want to know how to let that the wind makes move the turbine, and if I am on good way or there are some mistakes.
Sorry for my bad english and thakns in advance for your precious help.