Modelling of an Axial Piston Pump
I'm trying to simulate an axial piston pump. There is moving and rotating mesh (pistons). I am trying to get the flow and leakage characteristics. I have given pressure inlet and outlet boundary condition. The inlet has a pressure of 4 bar ( the fluid comes from a tank with a pressure of 4 bar ) and the outlet has atmospheric pressure condition. The Mach number is 0.116, so the simulation is incompressible. The inlet pressure does not have supersonic pressure.
After running the simulation, I am seeing that the outlet pressure is lesser than the inlet pressure. Shouldn't the outlet pressure be greater than the inlet pressure since the pistons are compressing the fluid ? I need to get an outlet pressure of 110 bar to 120 bar.
What is it that I am doing wrong ?