[athonyburk]

Hi,

I am modeling a liquid injection into a cylinder of constant volume. I set the boundary condition of the inlet as pressure inlet (9bar). There's no outflow of my system since I expected the liquid jet to cool and condensate the vapor phase (4bar) in the cylinder.

However, no matter how I changed other parameters, the pressure of the mixture in the cylinder would become 9bar immediately after the first iteration. Back flow was also noticed around the inlet. And there was no phase change.

But when I change the inlet condition into a velocity inlet, everything turns okay (at least until now).

What is wrong with this? Why can't I use the pressure inlet condition?

Thank you in advance.