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[surface handling] cfMesh - improving surface mesh

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Old   October 1, 2023, 09:47
Default cfMesh - improving surface mesh
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Hey,

I have a problem when using cfMesh (and snappyHexmesh). I want to mesh a 3D domain where my object of interest is a cone (which I think is the problem).

The mesh ''imprints'' characteristic pattern on the geometry that then appears on my pressure distribution on the surface and causes the solver to diverge.

I attach a picture of the pattern I am talking about to this post.

Has anyone encountered this issue before? If so, have you figured out a way of dealing with it?

I tried splitting the cone surface in hope it would break the symmetry of the patter but unfortunately it did not work.

--> meshDict <--

maxCellSize 0.008; // (MANDATORY) Maximum cell size in the mesh [m]
surfaceFile "constant/triSurface/OK_m.fms";

localRefinement
{
"coneBottomBack"
{
additiodditionalRefinementLevels 2;
refinementThickness 0.006; //[m]
}

"coneBottomFront"
{
cellSize 0.0004;
}

"coneTopBack"
{
additiodditionalRefinementLevels 2;
refinementThickness 0.006; //[m]
}

"coneTopFront"
{
cellSize 0.0004;
}
}

objectRefinements
{
cone1
{
type cone;
cellSize 0.001;
p0 (1e-4 0 0);
p1 (0.404 0 0);
radius0 0.01;
radius1 0.08;
}
}
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File Type: jpg Screenshot 2023-10-01 at 14.43.18.jpg (190.4 KB, 10 views)
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