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increasing mass using DyMesh and BC movingWallVelocity at twoPhaseEulerFoam

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Old   July 16, 2015, 03:04
Default increasing mass using DyMesh and BC movingWallVelocity at twoPhaseEulerFoam
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Werner
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Dear all,

i modified the solver of the twoPhaseEulerFoam for a dynamic mesh in openfoam extend 3.1. to simulate a granular flow in an dynamic mesh. I use the mesh of the movingCone - case with a oszillating laplacian mesh motion. The drag phase alpha in on the bottom so that it will be transported by the moving cone. The granular flow works good but there is a problem in the mass conservation. Using at velocity field Ua and Ub the BC fixedValue = (0 0 0) the flow field is wrong, clearly because the BC is wrong but the mass conservation is ok, using the the BC movingWallVelocity the flow field is perfect but the alpha value increases, so the mass in the system getting more and more. At alpha i used the BC zeroGradient. This should be a problem of the BC movingWallVelocity. When i checked the flux phia and phib it is also not zero at the BC, but regarding to some articles the flux should be zero.
So my question, does anybody know what the problem could be?
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mass conservation, movingwallvelocity, twophaseeulerfoam

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