[_sarah_]

Hi all,

I have a 2D tank that I initialize with a small layer of water on the bottom and with air on top. I apply a pressure-inlet condition to the bottom of the tank with a P1 and a pressure-outlet condition to the top of the tank with a P2 = 0 Pa. Both sides are symmetry. P1 and P2 are calculated so that the "hydrostatic height" is reached in the middle of the tank.

The operating pressure is atmospheric pressure and the operating density is 0. Gravity is activated.

My steady-state simulation converges towards an equilibrium state, which corresponds to the hydrostatic pressure. But my transient simulation calculates a tank that is completely filled with water at the end.

I am using VOF model and using variable time steps.

Does anybody have experience with this kind of problem?

Thanks,
Sarah