[andreas]

Dear foamers,

I am quite a beginner in OF and CFD, that's why I need your help :-)

My problem is as follow:
I have a multiphase flow. And I want to impose the pressure on a plane depending on the phase fraction which is in touch with the plane.

It would be like this: PressureBC = x1*p1 +x2*p2

with x1 and x2 the linear fraction (I work in 2D) of both phases on the patch. p1 and p2 would be the two pressures I want to impose.
e.g. if there is only air on the patch, the pressure would be 1atm. If there is only water, the pressure would be inferior so the fluid would get away.

Thank you all for your help,
Regards,
Andreas