Permeability filling of container outlet condition

unoder

Hi,

I have 2 phases with interFoam. I suppose they're both incompressible so I need an outlet in order to fill the container entirely with water. The shape is U-formed, so the problem is that the container will not be filled completely since now both phases are led out from outlet-section, *before* the container is entirely filled with water.

I want only to allow air to be led out, trapping the water inside the container. It's like applying permeability to the surrounding walls and I want to compare flow result with another program in which the permeability around the container is 250 cm^3/min. Perhaps it's not possible to apply a condition like this to Foam but any suggestions that will give comparable results are most welcome.

How do I do this? My outlet boundary condition so far is:

U:
outlet
{
type inletOutlet;
inletValue uniform (0 0 0);
value uniform (0 0 0);
}

gamma:
outlet
{
type inletOutlet;
inletValue uniform 0;
value uniform 0;
}

pd:
outlet
{
type fixedValue;
value uniform 0;
}