Hi, I am a biology research student and  new to SSW2010, after spending hours I learnt the basics of flow simulation. My problem is containing a sphere and a helix attached with each other and swimming in fluid. helix should rotate with a speed at a given speed in clockwise direction. at the same time sphere should rotate in counterclockwise direction with the given speed. Actually there is a bearing like thing to connect sphere and helix in reality.

I want to study the flow when both rotation take place. I made a helix  and gave rotating region, and  then a sphere with another rotating region. I dont know how to connect them now to consider a signle entity. when i ran the simulation i saw helix rotating but not sphere...

Any help plzz...