Pressure values at inlet are higher than given BC
 

hello all,

I am modeling a channel with gas flow. I have given 0 pressure at mass flow inlet. The mass flow rate is 0.171 kg/s. The operating pressure is 80 bar. When I see the pressure plot in XY Plot, it shows me the absolute pressure of 90 bar. Static pressure is 10 bar. I am not getting any idea, why it is so?

Thank you,

A mass flow inlet does not impose a pressure constraint unless it's supersonic.

Yes, the flow is supersonic but why at the end of the simulation when I plot XY , the pressure (absolute ) is 90 bar. Where the excess pressure came from? Gas is H2.