[2538sukham]

Hello. I have this setup where the moving wall pushes liquid out to an outlet which leads to a die cavity. The velocity boundary condition for the outlet in a paper is defined as zeroGradient. The pressure bc is not mentioned anywhere in any paper so far that I have read.
OpenFOAM damBreak case has velocity bc pressureInletOutletVelocity with value uniform (0 0 0) and pressure bc as totalPressure p0 uniform 0. Somewhere inletOutlet boundary condition too I could find. I am confused with the boundary conditions. Can anyone suggest me?