Reverse Flow at Rotating Pipe Outlet
 

Consider the case of a rotating pipe (rotating about its axis) and having axial inlet at one end, axial outlet at other end. There is one perpendicular pipe also attached to this main pipe which is having one outlet at other end. Pressure Outlet B.C. is given at both outlets.
Due to rotation and centrifugal effects, reverse flow happens at both of the outlets. To avoid reverse flow i can't extend the pipes (perpendicular pipe specially) because then it would affect the actual flow physics due to increased centrifugal effects in the extended pipes.

1. How reverse flow can be avoided in these kind of cases.
2. Due to reverse flow, i m not getting an unique solution and calculated
parameters are varying. Will it be correct to take the mean of the
variation range as the solution?

Thanks in Advance

Can't you make an extrusion on the outlets?