Fan Simulation Mixing plane interface reversed flow
 

Hi,

I have been using the the default interface option while simulating a rotor with inlet guide vanes and outlet guide vanes. I recently switched to the mixing plane model for the interface and this is giving me reversed flow at the interface of the rotor and the outlet guide vanes. I did not have such problem with the default interface.
When i plot the contours at the interface i can see no reverse flow.
Please help me out with this!

Thanks!