I am calculating the pressure at several points throughout a pipe with a 90 degree bend on CFD. However, when looking at the pressure for the inlet flow the value I am getting is 0, would this be correct? I would expect the value to be small but not exactly 0. I am using Star-ccm+; I've set the boundary condition at inlet to velocity inlet and the velocity of water flowing through the pipe is very small. I also have a derived plane at the inlet where a pressure report is calculated at that point.