centrifugal pump
 

i am performing a simulation on the pump.
i know the inlet velocity pressure and the outlet pressure also. by observing the flow i want to optimize the vane angle.

what are the boundary conditions that i should give and what should i set the reference pressure to?

should i feed in gauge pressure values or absolure pressure values because i am not getting a pressure rise at the outlet instead the pressure is decreasing.

plz help.