VAWT simulation
 

Hey all :)
Basically i am working on darrius turbine (VAWT) Which is composed of a rotating domain slightly greater than the turbine radius and stationary domain around the rotating one
working with omega =25 rad/sec
wind speed =5 m/sec
the following is the steps of solution
1- PB/transient
2-realizable k-epsilon
3-cell zone the i gave the internal domain mesh motion with 25 rad/sec
4-BC ....gave the blades rotational speed zero relative to moving domain ...setup inlet velocity 5 m/sec.....select the edges of moving and stationary domains to be interface instead of wall
5-creat mesh interface between edges of moving and stationary domains
then complete the normal steps after finishing i found the Cm:( to be very high
can any one tell me what i should do more to get the right solution please