509f15a0c5
In the new tutorial mesh/snappyHexMesh/pipe the pipe diameter changes by a factor
of 2 but the number of cells across the pipe is specified to be constant along
the length using the new "span" refinement mode in which the number of cells
across the span is set to be at least 40:
refinementRegions
{
pipe
{
mode span;
levels ((1000 2)); // Maximum distance and maximum level
cellsAcrossSpan 40;
}
}
This operates in conjunction with the "pointCloseness" option in surfaceFeatures
which writes a surfacePointScalarField of the local span of the domain. Note
that the behaviour of this option is critically dependent on the quality of this
field and the surface may need to be re-triangulated more isotropically to
ensure the "pointCloseness" is accurate and representative of the domain and the
required mesh distribution.
122 lines
2.6 KiB
C++
122 lines
2.6 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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};
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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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pipe
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{
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mode span;
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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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