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[Other] CFMesh: Interrupted Refinement using TetMesh in Elbow Geometry

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Old   May 28, 2024, 04:51
Default CFMesh: Interrupted Refinement using TetMesh in Elbow Geometry
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Hi, all.

I am testing cfMesh as an open source mesher on a mixing elbow. No issues in terms of workflow, the stl file from SALOME have been converted into an .fms file and the simulations are running smoothly.

However, when I am using the tetMesh, the object refinement I have placed in the bend of the elbow works well, then stops and then it refines again. Has anyone encountered such an issue? I have attached an image for clarity.

I don't encounter this necessarily with cartesianMesh or pMesh. Any suggestions are welcome. This issue increases my mesh skewness a lot.

Mesh dict is here:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                |
| \\      /  F ield         | cfMesh: A library for mesh generation          | 
|  \\    /   O peration     |                                                |
|   \\  /    A nd           | Author: Franjo Juretic                         | 
|    \\/     M anipulation  | E-mail: franjo.juretic@c-fields.com            |
\*---------------------------------------------------------------------------*/

FoamFile
{
    version   2.0;
    format    ascii;
    class     dictionary;
    location  "system";
    object    meshDict;
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

//By default I think the dimensions are in metres.

surfaceFile "elbow_90degree.fms";
maxCellSize 0.02;
boundaryCellSize 0.02;
keepCellsIntersectingBoundary 1;
objectRefinements
{
	elbow_refinement
	{
	  type	sphere;
	  cellSize	0.012;
	  centre	(0.04 0 0.04);
	  radius	0.05;
	  refinementThickness	0.1;
	}

}

boundaryLayers
{
	nLayers	5;
	thicknessRatio	1.2;
	maxFirstLayerThickness 0.0015;
	allowDiscontinuity 0;
}
     


renameBoundary
{
    defaultName        walls;
    defaultType        patch;

    newPatchNames
    {
        inlet1
        {
            newName     inlet1;
            type     patch;
        }

        outlet
        {
            newName     outlet;
            type     patch;
        }
        
        symmetry_plane
        {
            newName    symmetry_plane;
            type     symmetry;
        }

        walls
        {
            newName     walls;
            type     wall;
        }

        inlet2
        {
            newName     inlet2;
            type     patch;
        }
    }
}
// ************************************************************************* //
Attached Images
File Type: png cfmesh_tetrahedral_interrupted.png (179.0 KB, 7 views)
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cfmesh, refinement, tetmesh


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