4c08b463fd
The closeness option in surfaceFeatures set in surfaceFeaturesDict, e.g.
closeness
{
// Output the closeness of surface points to other surface elements.
pointCloseness yes;
}
calculates and writes both the internal and external surface "closeness"
measures either of which could be used to set the span refinement in
snappyHexMesh depending on which side of the surface is being meshed which is
specified with either refinement mode "insideSpan" or "externalSpan", e.g. in
the tutorials/mesh/snappyHexMesh/pipe case the inside of the pipe is meshed and
refined based on the internal span using the following specification:
refinementRegions
{
pipeWall
{
mode insideSpan;
levels ((1000 2));
cellsAcrossSpan 40;
}
}
128 lines
2.7 KiB
C++
128 lines
2.7 KiB
C++
/*--------------------------------*- C++ -*----------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Version: dev
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\\/ M anipulation |
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\*---------------------------------------------------------------------------*/
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FoamFile
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{
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version 2.0;
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format ascii;
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class dictionary;
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object snappyHexMeshDict;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#includeEtc "caseDicts/mesh/generation/snappyHexMeshDict.cfg"
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castellatedMesh on;
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snap on;
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addLayers off;
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geometry
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{
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pipe
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{
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type closedTriSurfaceMesh;
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file "pipe.obj";
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}
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pipeWall
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{
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type closedTriSurfaceMesh;
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file "pipeWall.obj";
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}
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};
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castellatedMeshControls
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{
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features
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(
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{
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file "pipe.eMesh";
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levels ((1 1));
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}
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);
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refinementSurfaces
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{
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pipe
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{
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level (1 1);
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patchInfo
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{
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type wall;
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}
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}
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}
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refinementRegions
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{
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pipeWall
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{
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mode insideSpan;
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levels ((1000 2));
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cellsAcrossSpan 40;
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}
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}
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locationInMesh (1e-5 1e-5 1e-5);
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}
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snapControls
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{
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// Number of patch smoothing iterations before finding correspondence
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// to surface
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nSmoothPatch 3;
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// Maximum relative distance for points to be attracted by surface.
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// True distance is this factor times local maximum edge length.
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// Note: changed(corrected) w.r.t 17x! (17x used 2* tolerance)
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tolerance 3.0;
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// Number of mesh displacement relaxation iterations.
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nSolveIter 30;
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// Maximum number of snapping relaxation iterations. Should stop
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// before upon reaching a correct mesh.
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nRelaxIter 5;
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// Feature snapping
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// Number of feature edge snapping iterations.
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// Leave out altogether to disable.
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nFeatureSnapIter 15;
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// Detect (geometric only) features by sampling the surface
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// (default=false).
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implicitFeatureSnap false;
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// Use castellatedMeshControls::features (default = true)
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explicitFeatureSnap true;
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// Detect features between multiple surfaces
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// (only for explicitFeatureSnap, default = false)
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multiRegionFeatureSnap false;
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}
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addLayersControls
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{
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layers
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{
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}
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relativeSizes true;
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expansionRatio 1.2;
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finalLayerThickness 0.5;
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minThickness 1e-3;
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}
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writeFlags
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(
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);
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mergeTolerance 1e-6;
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// ************************************************************************* //
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