Hi all,

I have solved the inlet mass problem.

Can you anyone explain the following problem:

I have data: Mass flow rate 200 Nm3/hr at pressure 20000 kPa. If I use mass flow rate boundary condition at inlet, how will ensure that gas is flowing at desired pressure (20000 kPa)?

How can I calculate the static pressure for a gas flow through annulus area? I have calculated by considering the Mach number=1 because as the annulus area is same from inlet to outlet, it is expected that flow will be chocked. I have set the static pressure in inlet BC (mass flow rate + Initial gauge pressure). But, I am not getting the expected pressure in the simulation results.