Boundary Conditions on MRFInterfoam
 

Hey foamers!

I'm advancing on my case of study but now the "problem" is about what BC I've to put in the outer patch. The solver used is a modified MRFInterFoam to get some things but not so different from the original one.

The case simulates a rotating tank with fluid which drops due to the rotation. The "problem" is that I don't know which condition I should use to get the fluid out of the domain cause it must disappear.

Here you can see an image of my case:
t=0s:

t=2s:

The images show the evolution of alpha1 in time, start and ending of simulation.

Here's my doubt:
Is there any condition similar to OutletInlet in which I don't have to specify values cause I really don't know the speed, pressure or alpha1 that the flow is going to get. Any ideas?