903 lines
34 KiB
C++
903 lines
34 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 | Version: v2412 |
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| \\ / A nd | Website: www.openfoam.com |
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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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// Type of mesh generation:
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// - castellated (default)
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// - castellatedBufferLayer
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//type castellatedBufferLayer;
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// Which of the steps to run
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castellatedMesh true;
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snap true;
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addLayers false;
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// Optional: single region surfaces get patch names according to
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// surface only. Multi-region surfaces get patch name
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// surface "_ "region. Default is true
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// singleRegionName false;
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// Optional: avoid patch-face merging. Allows mesh to be used for
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// refinement/unrefinement
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// mergePatchFaces false; // default true
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// Optional: allow patch-face merging even if differing patches. This avoids
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// splitting boundary faces and might benefit layer coverage.
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// (Note: only applicable if mergePatchFaces true)
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// mergeAcrossPatches true; // default false
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// Optional: preserve all generated patches. Default is to remove
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// zero-sized patches.
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// keepPatches true;
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// Geometry. All surfaces are of class searchableSurface.
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// Surfaces are used
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// - to specify refinement for any mesh cell intersecting it
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// - to specify refinement for any mesh cell inside/outside/near
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// - to 'snap' the mesh boundary to the surface
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geometry
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{
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box1x1x1
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{
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type box;
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min (1.5 1 -0.5);
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max (3.5 2 0.5);
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}
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// Shell for directional refinement
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wakeBox
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{
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type box;
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min (1.5 1 -0.5);
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max (3.5 2 0.5);
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}
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sphere.stl
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{
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type triSurfaceMesh;
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//tolerance 1E-5; // optional:non-default tolerance on intersections
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//maxTreeDepth 10; // optional:depth of octree. Decrease only in case
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// of memory limitations.
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// Per region the patchname. If not provided will be <surface>_<region>.
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// Note: this name cannot be used to identity this region in any
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// other part of this dictionary; it is only a name
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// for the combination of surface+region (which is only used
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// when creating patches)
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regions
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{
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secondSolid
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{
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name mySecondPatch;
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}
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}
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}
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sphere2
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{
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type sphere;
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centre (1.5 1.5 1.5);
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radius 1.03;
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}
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};
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// Settings for the castellatedMesh generation.
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castellatedMeshControls
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{
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// Refinement parameters
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// ~~~~~~~~~~~~~~~~~~~~~
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// If local number of cells is >= maxLocalCells on any processor
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// algorithm switches from refinement followed by (weighted) balancing
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// to (weighted) balancing followed by refinement.
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maxLocalCells 100000;
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// Overall cell limit (approximately). Refinement will stop immediately
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// upon reaching this number so a refinement level might not complete.
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// Note that this is the number of cells before removing the part which
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// is not 'visible' from the keepPoint. The final number of cells might
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// actually be a lot less.
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maxGlobalCells 2000000;
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// The surface refinement loop might spend lots of iterations refining just
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// a few cells. This setting will cause refinement to stop if
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// <= minRefinementCells cells are selected for refinement. Note: it will
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// at least do one iteration unless
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// a: the number of cells to refine is 0
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// b: minRefinementCells = -1. This is a special value indicating
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// no refinement.
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minRefinementCells 0;
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// Allow a certain level of imbalance during refining
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// (since balancing is quite expensive)
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// Expressed as fraction of perfect balance (= overall number of cells /
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// nProcs). 0=balance always. Can be triggered by using maxCellUnbalance
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maxLoadUnbalance 0.10;
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// Optional absolute unbalance start trigger. Used to avoid balancing
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// in first refinement iterations since balancing is expensive for
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// high core counts
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// The trigger value is used for two checks:
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// a: if on any processor the number of new added cells <= maxCellUnbalance
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// the balancing is skipped
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// b: if on any processor the value
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// (new cell count of proc - idealCellCount) <= maxCellUnbalance
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// the balancing is skipped
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// Set to -1 to deactivate
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//maxCellUnbalance 200000;
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// Optional forcing balancing after the mesh is completely refined
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//balanceAtEnd false;
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// Number of buffer layers between different levels.
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// 1 means normal 2:1 refinement restriction, larger means slower
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// refinement.
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nCellsBetweenLevels 1;
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// Explicit feature edge refinement
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// Specifies a level for any cell intersected by explicitly provided
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// edges.
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// This is a featureEdgeMesh, read from constant/triSurface for now.
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// Specify 'levels' in the same way as the 'distance' mode in the
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// refinementRegions (see below). The old specification
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// level 2;
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// is equivalent to
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// levels ((0 2));
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features
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(
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//{
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// file "someLine.eMesh";
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// //level 2; // Have level 2 for all cells intersected
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// // by feature.
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// levels ((0.1 2)); // Have level 2 for all cells within
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// // 0.1 of feature.
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//}
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);
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// Surface based refinement
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// ~~~~~~~~~~~~~~~~~~~~~~~~
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// Specifies two levels for every surface. The first is the minimum level,
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// every cell intersecting a surface gets refined up to the minimum level.
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// The second level is the maximum level. Cells that 'see' multiple
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// intersections where the intersections make an
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// angle > resolveFeatureAngle get refined up to the maximum level.
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refinementSurfaces
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{
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sphere.stl
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{
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// Surface-wise min and max refinement level
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level (2 2);
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// Optional region-wise level specification
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regions
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{
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secondSolid
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{
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level (3 3);
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}
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}
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// Optional specification of patch type (default is wall). No
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// constraint types (cyclic, symmetry) etc. are allowed.
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patchInfo
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{
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type patch;
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inGroups (meshedPatches);
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}
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//- Optional increment (on top of max level) in small gaps
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//gapLevelIncrement 2;
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//- Optional angle to detect small-large cell situation
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// perpendicular to the surface. Is the angle of face w.r.t.
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// the local surface normal. Use on flat(ish) surfaces only.
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// Otherwise leave out or set to negative number.
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//perpendicularAngle 10;
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//- Optional faceZone and (for closed surface) cellZone with
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// how to select the cells that are in the cellZone
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// (inside / outside / specified insidePoint)
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// The orientation of the faceZone is
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// - if on cellZone(s) : point out of (minimum) cellZone
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// - if freestanding : oriented according to surface
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//faceZone sphere;
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//cellZone sphere;
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//cellZoneInside inside; // outside/insidePoint
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//insidePoint (1 1 1); // if (cellZoneInside == insidePoint)
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// or alternative multiple insidePoints:
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//insidePoints ((1 1 1)); // if (cellZoneInside == insidePoint)
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//- Optional specification of what to do with faceZone faces:
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// internal : keep them as internal faces (default)
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// baffle : create baffles from them. This gives more
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// freedom in mesh motion
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// boundary : create free-standing boundary faces (baffles
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// but without the shared points)
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//faceType baffle;
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//- Optional automatic gap refinement. See section in
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// refinementRegions ('gapLevel', 'gapMode')
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//- Optional removal of cells in thin gaps.
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// Block any gap (opposite surfaces or opposite disconnected region
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// of surface):
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// - thinner than 2*blockcellsize where blockcellsize
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// is the size of a cell at blockLevel
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// Note: it does not relate to the refinement level of the cells
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// it 'blocks'/deletes.
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//blockLevel 10;
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//- Optional early detection of connections between inside and
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// outside locations. Default is only after all refinement has
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// been done.
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//leakLevel 10;
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// Additional refinement for regions of high curvature. Expressed
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// (bit similar to gapLevel) as:
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// - number of cells per radius of curvature. (usually 1 is
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// good enough)
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// - starting cell level? Not used at the moment.
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// - maximum cell level. This can be smaller or larger than the
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// max 'surface' level
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// - minumum curvature radius to ignore (expressed as a cell level).
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// This can be used to avoid detecting small sharp surface
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// features. Set to -1 to ignore.
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// (sometimes you want more refinement than sharp features since
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// these can be done with feature edge snapping (so can leave
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// level (0 0))
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//curvatureLevel (10 0 10 -1);
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// Optional disabling of buffer layer addition (if switched on by
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// type = castellatedBufferLayer)
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addBufferLayers false;
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}
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}
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// Feature angle:
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// - used if min and max refinement level of a surface differ
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// - used if feature snapping (see snapControls below) is used
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resolveFeatureAngle 30;
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//- Optional increment (on top of max level) in small gaps
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//gapLevelIncrement 2;
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// Planar angle:
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// - used to determine if surface normals
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// are roughly the same or opposite. Used
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// - in proximity refinement
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// - to decide when to merge free-standing baffles
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// (if e.g. running in surfaceSimplify mode set this to 180 to
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// merge all baffles)
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// - in snapping to avoid snapping to nearest on 'wrong' side
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// of thin gap
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//
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// If not specified same as resolveFeatureAngle
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planarAngle 30;
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// Region-wise refinement
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// ~~~~~~~~~~~~~~~~~~~~~~
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// Specifies refinement level for cells in relation to a surface. One of
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// three modes
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// - distance. 'levels' specifies per distance to the surface the
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// wanted refinement level. The distances need to be specified in
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// increasing order.
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// - inside. 'levels' is only one entry and only the level is used. All
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// cells inside the surface get refined up to the level. The surface
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// needs to be closed for this to be possible.
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// - outside. Same but cells outside.
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refinementRegions
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{
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box1x1x1
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{
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mode inside;
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levels ((1.0 4));
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}
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//sphere.stl
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//{
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// mode inside;
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// levels ((1.0 4));
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// // Optional override of uniform refinement level such
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// // that in small gaps we're getting more cells.
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// // The specification is
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// // - numGapCells : minimum number of cells in the gap
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// // (usually >3; lower than this might not
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// // resolve correctly)
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// // - minLevel : min refinement level at which to kick in
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// // - maxLevel : upper refinement level (to avoid refinement
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// // continuing on a single extraneous feature)
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// // All three settings can be overridden on a surface by
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// // surface basis in the refinementSurfaces section.
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// gapLevel (<numGapCells> <minLevel> <maxlevel>);
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// // Optional: when doing the gapLevel refinement directly remove
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// // based on orientation w.r.t. gap. This limits the
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// // amount of cells before doing the 'locationInMesh'
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// // cell selection. Default is 'mixed' i.e. keep cells
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// // whilst doing the gap-level refinement.
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// //gapMode inside; // inside/outside/mixed
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// //gapSelf false; // ignore gaps in same surface
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//}
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//wakeBox
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//{
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// mode inside;
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// // Dummy base level
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// levels ((10000 0));
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//
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// // Optional directional refinement (after all other refinement)
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// // Directional refinement
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// // for all cells according to 'mode' ('inside' or 'outside';
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// // 'distance' not supported) and within certain range. E.g.
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// // - for all cells with level 2-5
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// // - do one split in x direction
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// levelIncrement (2 5 (1 0 0));
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//
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// // Note
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// // - ignores 'levels' and gap* settings.
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// // - the cellLevel/pointLevels files are no longer consistent
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// // with the mesh, the resulting mesh is no longer compatible
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// // with e.g. dynamic refinement/unrefinement.
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// // - cellLevel will include any directional refinement
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// // (i.e. it will be the maximum of all three directions)
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//}
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//wakeBox
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//{
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// mode inside;
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// // Dummy base level
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// levels ((10000 0));
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//
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// // Optional directional refinement (after all other refinement)
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// // Directional refinement
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// // for all cells according to 'mode' ('inside' or 'outside';
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// // 'distance' not supported) and within certain range. E.g.
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// // - for all cells with level 2-5
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// // - do one split in x direction
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// levelIncrement (2 5 (1 0 0));
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//
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// // Note
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// // - ignores 'levels' and gap* settings.
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// // - the cellLevel/pointLevels files are no longer consistent
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// // with the mesh, the resulting mesh is no longer compatible
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// // with e.g. dynamic refinement/unrefinement.
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// // - cellLevel will include any directional refinement
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// // (i.e. it will be the maximum of all three directions)
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//
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// // Optional directional expansion-ratio smoothing (after all
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// // refinement). This will try to smooth out edge/cell size jumps
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// // Specify smoothing direction and number of iterations
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// smoothDirection (1 0 0);
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// // Smoothing of expansion ratio
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// nSmoothExpansion 100;
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// // Smoothing of positions
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// nSmoothPosition 100;
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//}
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}
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// Optionally limit refinement in geometric region. This limits all
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// refinement (from features, refinementSurfaces, refinementRegions)
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// in a given geometric region. The syntax is exactly the same as for the
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// refinementRegions; the cell level now specifies the upper limit
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// for any cell. (a special setting is cell level -1 which will remove
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// any cells inside the region). Note that it does not override the
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// refinement constraints given by the nCellsBetweenLevels setting.
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limitRegions
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{
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}
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// Mesh selection
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// ~~~~~~~~~~~~~~
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// After refinement patches get added for all refinementSurfaces and
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// all cells intersecting the surfaces get put into these patches. The
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// section reachable from the location(s)InMesh is kept.
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// NOTE: This point should never be on a face, always inside a cell, even
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// after refinement.
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//
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// There are two different ways of specifying the regions to keep:
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// 1. a single locationInMesh. This is the unzoned part of the mesh.
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// All the 'zoned' surfaces are marked as such
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// in the refinementSurfaces with the faceZone and cellZone keywords.
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// It is illegal to have the locationInMesh inside a surface for which
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// a cellZone is specified.
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//
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// or
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//
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// 2. multiple locationsInMesh, with per location the name of the cellZone.
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// This uses walking to determine zones and automatically creates
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// faceZones on the outside of cellZones. The special name 'none' is
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// used to indicate the unzoned/background part of the mesh.
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// Ad 1. Specify a single location and how to treat faces inbetween
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// cellZones
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locationInMesh (5 0.28 0.43);
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// Whether any faceZones (as specified in the refinementSurfaces)
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// are only on the boundary of corresponding cellZones.
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// Not used if there are no faceZones. The behaviour has changed
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// with respect to previous versions:
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// true : all intersections with surface are put in faceZone
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// (same behaviour as before)
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// false : depending on the type of surface intersected:
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// - if intersecting surface has faceZone only (so no cellZone)
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// leave in faceZone (so behave as if set to true) (= changed
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// behaviour)
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// - if intersecting surface has faceZone and cellZone
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// remove if inbetween same cellZone or if on boundary
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// (same behaviour as before)
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allowFreeStandingZoneFaces true;
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// 2. Specify multiple locations with optional cellZones for the
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// regions (use cellZone "none" to specify the unzoned cells)
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// FaceZones are automatically constructed from the
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// names of the cellZones: <cellZoneA> _to_ <cellZoneB>
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// where the cellZoneA is the lowest numbered cellZone (non-cellZone
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// cells are in a special region called "none" which is always
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// last).
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locationsInMesh
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(
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((-0.09 -0.039 -0.049) bottomAir) // cellZone 0
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((-0.09 0.009 -0.049) topAir) // cellZone 1
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((-0.09 0.001 -0.049) leftSolid) // cellZone 2
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((0.02 0.001 -0.049) rightSolid) // cellZone 3
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((-0.001 -0.039 0.0015) heater) // cellZone 4
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);
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// Per synthesised faceZone name the faceType and type of baffles to
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// create
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faceZoneControls
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{
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bottomAir_to_heater
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{
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// Optional specification of patch type (default is wall). No
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// constraint types (cyclic, symmetry) etc. are allowed.
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patchInfo
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{
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type patch;
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inGroups (patchPatches);
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}
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faceType baffle;
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}
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}
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// Optional locations that should not be reachable from
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// location(s)InMesh
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locationsOutsideMesh ((100 100 100));
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// Optional: do not remove cells likely to give snapping problems
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// handleSnapProblems false;
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// Optional: switch off topological test for cells to-be-squashed
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// and use geometric test instead
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//useTopologicalSnapDetection false;
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// Optional: do not refine surface cells with opposite faces of
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// differing refinement levels
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//interfaceRefine false;
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// Optional: use an erosion instead of region assignment to allocate
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// left-over cells to the background region (i.e. make cellZones
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// consistent with the intersections of the surface).
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// Erosion is specified as a number of erosion iterations.
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// Erosion has less chance of bleeding and changing the zone
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// for a complete region.
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// A negative value implements 'growing' the cellZones which
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// might help with small non-physical gaps inbetween cellZones.
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// (currently only a single layer growth i.e. -1 is supported)
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// Default value is 0.
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//nCellZoneErodeIter 2;
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// Optional: delete any region smaller than below fraction of the overall
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// size (on a per-zone basis). This is occasionally useful
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// when generating meshes with faceZones as baffles or boundary
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// faces.
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//minCellFraction 0.001;
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// Optional: same but in absolute number of cells. Default is 0.
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//nMinCells 100;
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// Optional: enable automatic leak closure (default is exit immediately)
|
|
//useLeakClosure true;
|
|
}
|
|
|
|
// Settings for the snapping.
|
|
snapControls
|
|
{
|
|
// Number of patch smoothing iterations before finding correspondence
|
|
// to surface
|
|
nSmoothPatch 3;
|
|
|
|
// Optional: number of smoothing iterations for internal points on
|
|
// refinement interfaces. This will reduce non-orthogonality on
|
|
// refinement interfaces.
|
|
//nSmoothInternal $nSmoothPatch;
|
|
|
|
// Maximum relative distance for points to be attracted by surface.
|
|
// True distance is this factor times local maximum edge length.
|
|
tolerance 2.0;
|
|
|
|
// Number of mesh displacement relaxation iterations.
|
|
nSolveIter 30;
|
|
|
|
// Maximum number of snapping relaxation iterations. Should stop
|
|
// before upon reaching a correct mesh.
|
|
nRelaxIter 5;
|
|
|
|
// (wip) disable snapping to opposite near surfaces (revert to 22x
|
|
// behaviour)
|
|
// detectNearSurfacesSnap false;
|
|
|
|
|
|
// Feature snapping
|
|
|
|
// Number of feature edge snapping iterations.
|
|
// Leave out altogether to disable.
|
|
nFeatureSnapIter 10;
|
|
|
|
// Detect (geometric only) features by sampling the surface
|
|
// (default=false).
|
|
implicitFeatureSnap false;
|
|
|
|
// Use castellatedMeshControls::features (default = true)
|
|
explicitFeatureSnap true;
|
|
|
|
// Detect features between multiple surfaces
|
|
// (only for explicitFeatureSnap, default = false)
|
|
multiRegionFeatureSnap false;
|
|
|
|
|
|
//- When to run face splitting (never at first iteration, always
|
|
// at last iteration). Is interval. Default -1 (disabled)
|
|
//nFaceSplitInterval 5;
|
|
|
|
|
|
// (wip) Optional for explicit feature snapping:
|
|
//- Detect baffle edges. Default is true.
|
|
//detectBaffles false;
|
|
//- On any faces where points are on multiple regions (see
|
|
// multiRegionFeatureSnap) have the other points follow these points
|
|
// instead of having their own independent movement, i.e. have snapping
|
|
// to multi-region edges/points take priority. This might aid snapping
|
|
// to sharp edges that are also region edges. The default is false
|
|
// since it might also introduce problems - at morphing the patching
|
|
// might still be wrong so points get 'released' instead of behaving
|
|
// as any other point.
|
|
//releasePoints true;
|
|
//- Walk along feature edges, adding missing ones. Default is true.
|
|
//stringFeatures false;
|
|
//- If diagonal attraction also attract other face points. Default is
|
|
// false
|
|
//avoidDiagonal true;
|
|
//- When splitting what concave faces to leave intact. Default is 45
|
|
// degrees.
|
|
//concaveAngle 30;
|
|
//- When splitting the minimum area ratio of faces. If face split
|
|
// causes ratio of area less than this do not split. Default is 0.3
|
|
//minAreaRatio 0.3;
|
|
//- Attract points only to the surface they originate from. Default
|
|
// false. This can improve snapping of intersecting surfaces.
|
|
// strictRegionSnap true;
|
|
|
|
|
|
// Choice of mesh motion algorithm to inflate layers (only used for mode
|
|
// castellatedBufferLayer)
|
|
|
|
//solver displacementPointSmoothing;
|
|
//displacementPointSmoothingCoeffs
|
|
//{
|
|
// // Use laplacian to untangle problem areas
|
|
// pointSmoother laplacian;
|
|
// nPointSmootherIter 10;
|
|
//}
|
|
}
|
|
|
|
// Settings for the layer addition.
|
|
addLayersControls
|
|
{
|
|
// Are the thickness parameters below relative to the undistorted
|
|
// size of the refined cell outside layer (true) or absolute sizes (false).
|
|
relativeSizes true;
|
|
|
|
// Layer thickness specification. This can be specified either through the
|
|
// 'thicknessModel' parameter (new) or by specifying the individual
|
|
// settings. The parameters are the cell height of the cells next to the
|
|
// wall ('firstLayerThickness'), the cell height of the cells next to the
|
|
// bulk ('finalLayerThickness'), the expansionRatio ('expansionRatio') and
|
|
// the overall thickness of all layers ('thickness').
|
|
|
|
//- specification of firstLayerThickness and overallThicknes. From these
|
|
// it calculates the needed expansionRatio.
|
|
// thicknessModel firstAndOverall;
|
|
|
|
//- specification of firstLayerThickness and expansionRatio.
|
|
// thicknessModel firstAndExpansion;
|
|
|
|
//- specification of finalLayerThickness and expansionRatio.
|
|
// thicknessModel finalAndExpansion;
|
|
|
|
//- specification of thickness and expansionRatio.
|
|
// thicknessModel overallAndExpansion;
|
|
|
|
//- specification of firstLayerThickness and finalLayerThickness. The
|
|
// firstLayerThickness is always absolute, the finalLayerThickness is
|
|
// always relative, independent of the relativeSizes setting
|
|
// thicknessModel firstAndRelativeFinal;
|
|
|
|
|
|
// Expansion factor for layer mesh
|
|
expansionRatio 1.0;
|
|
|
|
// Wanted thickness of the layer furthest away from the wall.
|
|
// If relativeSizes this is relative to undistorted size of cell
|
|
// outside layer.
|
|
finalLayerThickness 0.3;
|
|
|
|
|
|
// Minimum overall thickness of total layers. If for any reason layer
|
|
// cannot be above minThickness do not add layer.
|
|
// If relativeSizes this is relative to undistorted size of cell
|
|
// outside layer..
|
|
minThickness 0.1;
|
|
|
|
|
|
// Per final patch or faceZone (so not geometry!) the layer information:
|
|
// - whether to use relative or absolute sizes
|
|
// - thicknessModel (or individual settings)
|
|
// - minimum thickness
|
|
//
|
|
// Note: mesh shrinking behaviour changed after 21x. Any non-mentioned
|
|
// patches now slide unless:
|
|
// - nSurfaceLayers is explicitly mentioned to be 0.
|
|
// - angle to nearest surface < slipFeatureAngle (see below)
|
|
layers
|
|
{
|
|
sphere.stl_firstSolid
|
|
{
|
|
nSurfaceLayers 1;
|
|
|
|
}
|
|
maxY
|
|
{
|
|
nSurfaceLayers 1;
|
|
// Per patch layer data
|
|
expansionRatio 1.3;
|
|
finalLayerThickness 0.3;
|
|
minThickness 0.1;
|
|
}
|
|
|
|
// Disable any mesh shrinking and layer addition on any point of
|
|
// a patch by setting nSurfaceLayers to 0
|
|
frozenPatches
|
|
{
|
|
nSurfaceLayers 0;
|
|
}
|
|
}
|
|
|
|
// If points get not extruded do nGrow layers of connected faces that are
|
|
// also not grown. This helps convergence of the layer addition process
|
|
// close to features.
|
|
// Note: changed(corrected) w.r.t 1.7.x! (didn't do anything in 1.7.x)
|
|
nGrow 0;
|
|
|
|
// Advanced settings
|
|
|
|
|
|
// Static analysis of starting mesh
|
|
|
|
// When not to extrude surface. 0 is flat surface, 90 is when two faces
|
|
// are perpendicular. Note: was not working correctly < 1806
|
|
featureAngle 120;
|
|
|
|
// When to merge patch faces. Default is featureAngle. Useful when
|
|
// featureAngle is large.
|
|
//mergePatchFacesAngle 45;
|
|
|
|
// Stop layer growth on highly warped cells
|
|
maxFaceThicknessRatio 0.5;
|
|
|
|
|
|
// Patch displacement
|
|
|
|
// Number of smoothing iterations of surface normals
|
|
nSmoothSurfaceNormals 1;
|
|
|
|
// Smooth layer thickness over surface patches
|
|
nSmoothThickness 10;
|
|
|
|
|
|
|
|
// Choice of mesh shrinking algorithm
|
|
|
|
// Optional mesh shrinking algorithm (default is displacementMedialAxis)
|
|
// The displacementMotionSolver is a wrapper around the displacement
|
|
// motion solvers. It needs specification of the solver to use and
|
|
// its control dictionary.
|
|
//meshShrinker displacementMotionSolver;
|
|
//solver displacementLaplacian;
|
|
//displacementLaplacianCoeffs
|
|
//{
|
|
// diffusivity quadratic inverseDistance
|
|
// (
|
|
// sphere.stl_firstSolid
|
|
// maxY
|
|
// );
|
|
//}
|
|
// Note that e.g. displacementLaplacian needs entries in
|
|
// fvSchemes, fvSolution. Also specify a minIter > 1 when solving
|
|
// cellDisplacement since otherwise solution might not be sufficiently
|
|
// accurate on points.
|
|
|
|
|
|
// Medial axis analysis (for use with default displacementMedialAxis)
|
|
|
|
// Angle used to pick up medial axis points
|
|
// Note: changed(corrected) w.r.t 1.7.x! 90 degrees corresponds to 130
|
|
// in 1.7.x.
|
|
minMedialAxisAngle 90;
|
|
|
|
// Reduce layer growth where ratio thickness to medial
|
|
// distance is large
|
|
maxThicknessToMedialRatio 0.3;
|
|
|
|
// Number of smoothing iterations of interior mesh movement direction
|
|
nSmoothNormals 3;
|
|
|
|
// Optional: limit the number of steps walking away from the surface.
|
|
// Default is unlimited.
|
|
//nMedialAxisIter 10;
|
|
|
|
// Optional: smooth displacement after medial axis determination.
|
|
// default is 0.
|
|
//nSmoothDisplacement 90;
|
|
|
|
// (wip)Optional: do not extrude any point where
|
|
// (false) : all surrounding faces are not fully extruded
|
|
// (true) : all surrounding points are not extruded
|
|
// Default is false.
|
|
//detectExtrusionIsland true;
|
|
|
|
// Optional: do not extrude around sharp edges if both faces are not
|
|
// fully extruded i.e. if one of the faces on either side would
|
|
// become a wedge.
|
|
// Default is 0.5*featureAngle. Set to -180 always attempt extrusion
|
|
//layerTerminationAngle 25;
|
|
|
|
// Optional: disable shrinking of edges that have one (or two) points
|
|
// on an extruded patch.
|
|
// Default is false to enable single/two cell thick channels to still
|
|
// have layers. In <=1806 this was true by default. On larger gaps it
|
|
// should have no effect.
|
|
//disableWallEdges true;
|
|
|
|
// Optional: at non-patched sides allow mesh to slip if extrusion
|
|
// direction makes angle larger than slipFeatureAngle. Default is
|
|
// 0.5*featureAngle.
|
|
slipFeatureAngle 30;
|
|
|
|
// Maximum number of snapping relaxation iterations. Should stop
|
|
// before upon reaching a correct mesh.
|
|
nRelaxIter 5;
|
|
|
|
|
|
// Mesh shrinking
|
|
|
|
// Create buffer region for new layer terminations, i.e. gradually
|
|
// step down number of layers. Set to <0 to terminate layer in one go.
|
|
nBufferCellsNoExtrude 0;
|
|
|
|
// Overall max number of layer addition iterations. The mesher will
|
|
// exit if it reaches this number of iterations; possibly with an
|
|
// illegal mesh.
|
|
nLayerIter 50;
|
|
|
|
// Max number of iterations after which relaxed meshQuality controls
|
|
// get used. Up to nRelaxedIter it uses the settings in
|
|
// meshQualityControls,
|
|
// after nRelaxedIter it uses the values in
|
|
// meshQualityControls::relaxed.
|
|
nRelaxedIter 20;
|
|
|
|
// Additional reporting: if there are just a few faces where there
|
|
// are mesh errors (after adding the layers) print their face centres.
|
|
// This helps in tracking down problematic mesh areas.
|
|
//additionalReporting true;
|
|
}
|
|
|
|
// Generic mesh quality settings. At any undoable phase these determine
|
|
// where to undo.
|
|
meshQualityControls
|
|
{
|
|
// Specify mesh quality constraints in separate dictionary so can
|
|
// be reused (e.g. checkMesh -meshQuality)
|
|
#include "meshQualityDict"
|
|
|
|
|
|
// Optional : some meshing phases allow usage of relaxed rules.
|
|
// See e.g. addLayersControls::nRelaxedIter.
|
|
relaxed
|
|
{
|
|
// Maximum non-orthogonality allowed. Set to 180 to disable.
|
|
maxNonOrtho 75;
|
|
}
|
|
|
|
|
|
// Advanced
|
|
|
|
// Number of error distribution iterations
|
|
nSmoothScale 4;
|
|
// amount to scale back displacement at error points
|
|
errorReduction 0.75;
|
|
}
|
|
|
|
// Advanced
|
|
|
|
//// Debug flags
|
|
//debugFlags
|
|
//(
|
|
// mesh // write intermediate meshes
|
|
// intersections // write current mesh intersections as .obj files
|
|
// featureSeeds // write information about explicit feature edge
|
|
// // refinement
|
|
// attraction // write attraction as .obj files
|
|
// layerInfo // write information about layers
|
|
//);
|
|
//
|
|
//// Write flags
|
|
//writeFlags
|
|
//(
|
|
// scalarLevels // write volScalarField with cellLevel for postprocessing
|
|
// layerSets // write cellSets, faceSets of faces in layer
|
|
// layerFields // write volScalarField for layer coverage
|
|
//);
|
|
|
|
|
|
//// Format for writing lines. E.g. leak path. Default is vtk format.
|
|
//setFormat ensight;
|
|
|
|
//// Format to use for surfaces. E.g. leak-closure faces. Default is vtk format.
|
|
//surfaceFormat vtk;
|
|
|
|
// Merge tolerance. Is fraction of overall bounding box of initial mesh.
|
|
// Note: the write tolerance needs to be higher than this.
|
|
mergeTolerance 1e-6;
|
|
|
|
// ************************************************************************* //
|