linch 
April 27, 2012 07:28 
expandableInterFoam
1 Attachment(s)
Hi guys,
I'm working on a modification of the interFoam solver that considers isobaric expansibility of both phases.
So my modified VOF and pressure correction equations look like:
where is velocity divergence computed from the continuity equation.
The problem with this formulation is, that it is not conservative and requires consistent and accurate calculation of the source terms and . For now it works fine within in each phase, but I still have considerable mass imbalance in the interface region.
The second formulation I try to implement is a conservative one. VOF equation works well:
But I get pressurevelocityoscillations if I solve following pressure correction equation:
with
It looks like the classical chessboard problem (cartesian mesh), which I thought shouldn't be there because of the Rhie&Chowlike discretization of pressure. And that's actually my question to you: why does it happen and how could I prevent it?
Can anyone help me with a smart advice?
Best regards,
Ilya
