Learning Forum

[Alberto]

Hi community,

I'm trying to simulate the rotation of a blade triggered by an inflow velocity. My question is: How it is possible that i measure 30% less the expected thrust (5.5e-4N) when i'm using overse mesh with one degree of freedom, reaching also higher rotational velocity (140 rad/s) with respect to the sliding mesh where i set the inlet velocity as in the overset and I assign a rotation rate  (124 rad/s) to the blade in the cell zone condition panel. When i compute the force in the sliding mesh, it match with what i'm excepting but in the overset framework a huge error occur.

I've tried different boundary conditions, always the same error

Thanks a lot

[Federico]

Hello Alberto, 

Are both cases modeling the same thing? It seems like you are computing forces generated by the flow on the blade for the overset case, while for the sliding mesh you are introducing rotation through a source to the corresponding zone.