# Boundary Condition problem with multiphase flow

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 August 13, 2013, 11:09 Boundary Condition problem with multiphase flow #1 New Member   Join Date: Mar 2011 Posts: 2 Rep Power: 0 Hi there, Basically, the problem I have is a square domain initially filled with air and as the time goes by, water come in through the inlet. The moisture is then carried to the outlet by a moving wall with a constant velocity. I am using interFoam to solve the problem and when checking out the solution, there is no water coming in. The boundary conditions for the two phases are: air: for the walls is zeroGradient; outlet { type fixedValue; uniform 0; } inlet { type inletOutlet; inletValue uniform 0; value uniform 0; } atmosphere { type inletOutlet; inletValue uniform 1; value uniform 1; } water: for the walls is zeroGradient; outlet { type fixedValue; uniform 0; } inlet { type inletOutlet; inletValue uniform 1; value uniform 1; } atmosphere { type inletOutlet; inletValue uniform 0; value uniform 0; } for the pressure field: for the walls is fixedFluxPressure with value uniform 0; outlet { type totalPressure; p0 uniform 0; U U; phi phi; rho rho; psi none; gamma 1; value uniform 0; } inlet { type zeroGradient; } atmosphere { type totalPressure; p0 uniform 0; U U; phi phi; rho rho; psi none; gamma 1; value uniform 0; } for the Velocity file U: walls... fixedValue uniform (0 0 0) outlet { type pressureInletOutletVelocity; value uniform(0 0 0); } inlet { type pressureInletOutletVelocity; value uniform(0 -0.1 0); } } atmosphere { type pressureInletOutletVelocity; value uniform(0 0 0); } I have tried to adapt these condition from the damBreak tutorial since I have no experience by using OpenFOAM but, it is not working. I hope you can help me to find out the solution for this problem. Thank you very much.

 Tags boundary condition, interfoam, multiphase, openfoam

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