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MoveDynamicMesh for a cylinder. Good mesh in serial. Bad mesh in parallel

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Old   October 25, 2023, 09:40
Default MoveDynamicMesh for a cylinder. Good mesh in serial. Bad mesh in parallel
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M. Montero
Join Date: Mar 2009
Location: Madrid
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Hi All,

OpenFoam version: 2212

I am simulating a cylinder with a prescribed deformation based on the z-coordinate. After playing a little bit with the laplacian solver, it works ok in serial. The mesh is ok for every time step. I am using moveDynamicMesh for testing purposes before launching the pimpleDyMFoam.

The problem is that, it fails in parallel and the quality issues are located more or less where the partitions are located.

Here you can find my dynamicMeshDict. Defining the interpolation method did a great improvement due to the special characteristics of the mesh (y+=1, high aspect ratio cells near the surface).

I have tried scotch and simple for the decomposition, 2 or 8 processors. There are always problems but in different regions of the mesh.

I have tried commsType blocking; but there is no effect.

Any clue about how to solve it?

    version     2.0;
    format      ascii;
    class       dictionary;
    object      dynamicMeshDict;

dynamicFvMesh dynamicMotionSolverFvMesh;

motionSolverLibs ("");

solver      displacementLaplacian;

displacementLaplacianCoeffs {
    diffusivity quadratic inverseDistance (cylinder);
    frozenPointsZone frozenZone;
    interpolation patchCorrected

Best Regards
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