[hos128]

Hi guys
I'm modeling a box with two phase of liquid and vapor water in a close box so that the liquid water is in the bottom of the box and the vapor is in the top of that.
the problem here is the pressure don't go truly after transient running and a big drop of pressure will occur.
for example when I'm initializing this system with the saturation pressure and temperature in 360 k and 62194.11 pascal (the values is in thermodynamic table) and the boundary condition of walls in 360 k too; after transient running of that, ( we know that the system should not change and both pressure and temperature would not change); but the pressure falls down and goes in about 150 pascal!!!

i used both euler and vof and a lot of change in running but nothing changed!

please if anyone can help me I would be very grateful

Thank you in advance