Hi Chaitanya,

Thanks for your reply. I tried setting the inlet as an inlet vent. The static pressure at the inlet is around -60 Pa. However, when I look at the total pressure on the x-plane, there is a large pressure inside the air gap. I've attached a screenshot below. When I look at the velocity vector inside the gap, there is a large tangential velocity. Since the air gap is not rotating, I find this a little confusing. Is this because of the boundary conditions I set or some other reason? Also, a question on the 3D fan zone: is there any resources on how to get the inflection point ratio? I know how to model the blades separately, but how do I use the results in Fluent to calculate this value? 

Thanks again!