Dynamic stall in Cl vs AOA
 

Hello everyone ,
I am doing my masters thesis on Vertical Axis wind turbine. I have few doubts regarding the simulation
1) My domain is circular. Should I give velocity as magnitude with direction or magnitude with normal to boundary. How does any of them affect the result.
2) I did a trail using velocity with magnitude and normal to boundary but my coefficient of lift Vs AOA doesn’t show dynamic stall occurrence.
How to solve the issue?Attachment 70444
Attached is the file of Cl Vs Azimuth for a NACA0015 profile .