Hi All,

I am really in hard time in using pressure boundary. I am trying to implement pressure pulse excitation at pressure boundary with inflow fluid (concentration = 1). The pulse is about 15KPa for 15 microsec. From my excitation, I surely have a fluid flow into domain. But the problem is occured when my prescribed pressure at boundary goes to zero, the inflow fluid is not stopped or slowed down (monitored by the fluid velocity) . Could anybody explain me why the flow still keep coming into the domain while the pressure goes to zeros?

Momentum