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TUT: snappyHexMesh: demo multiple insidePoints

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This commit is contained in:
mattijs 2023-12-07 14:41:37 +00:00
parent 8cd22c1a83
commit 227480c366
14 changed files with 756 additions and 0 deletions
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1
tutorials/mesh/snappyHexMesh/Allrun
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@ -14,6 +14,7 @@ cd "${0%/*}" || exit # Run from this directory
( cd airfoilWithLayers && ./Allrun )
( cd sphere_gapClosure && ./Allrun )
( cd block_with_curvature && ./Allrun )
( cd insidePoints && ./Allrun )
exit 0

8
tutorials/mesh/snappyHexMesh/insidePoints/Allclean Executable file
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@ -0,0 +1,8 @@
#!/bin/sh
cd "${0%/*}" || exit # Run from this directory
. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions # Tutorial clean functions
#------------------------------------------------------------------------------
cleanCase0
#------------------------------------------------------------------------------

13
tutorials/mesh/snappyHexMesh/insidePoints/Allrun Executable file
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@ -0,0 +1,13 @@
#!/bin/sh
cd "${0%/*}" || exit # Run from this directory
. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions # Tutorial run functions
. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions # Tutorial clean functions
#------------------------------------------------------------------------------
runApplication blockMesh
runApplication decomposePar
runParallel snappyHexMesh
#------------------------------------------------------------------------------

2
tutorials/mesh/snappyHexMesh/insidePoints/README.txt Normal file
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@ -0,0 +1,2 @@
- demo multiple insidePoints per cellZone
- two boxes, one additionally split in y direction so in total 3 separate regions

41
tutorials/mesh/snappyHexMesh/insidePoints/constant/triSurface/box.obj Normal file
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@ -0,0 +1,41 @@
# Generated by Visualization Toolkit
v -0.5 0.5 -0.5
v 0.5 0.5 -0.5
v -0.5 -0.5 -0.5
v 0.5 -0.5 -0.5
v -0.5 0.5 0.5
v 0.5 0.5 0.5
v 0.5 -0.5 0.5
v -0.5 -0.5 0.5
v 2.5 1.5 0.5
v 2.5 1.5 1.5
v 2.5 0.5 0.5
v 2.5 0.5 1.5
v 1.5 1.5 0.5
v 1.5 0.5 0.5
v 1.5 1.5 1.5
v 1.5 0.5 1.5
f 1 2 3
f 3 2 4
f 1 5 2
f 2 5 6
f 4 7 3
f 3 7 8
f 3 8 1
f 1 8 5
f 2 6 4
f 4 6 7
f 8 7 5
f 5 7 6
f 9 10 11
f 11 10 12
f 13 9 14
f 14 9 11
f 13 15 9
f 9 15 10
f 11 12 14
f 14 12 16
f 14 16 13
f 13 16 15
f 16 12 15
f 15 12 10

21
tutorials/mesh/snappyHexMesh/insidePoints/constant/triSurface/plane.obj Normal file
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@ -0,0 +1,21 @@
# Generated by Visualization Toolkit
v 1.25 1.0499999523162842 0.25
v 2.75 1.0499999523162842 0.25
v 1.25 0.949999988079071 0.25
v 2.75 0.949999988079071 0.25
v 1.25 1.0499999523162842 1.75
v 2.75 1.0499999523162842 1.75
v 2.75 0.949999988079071 1.75
v 1.25 0.949999988079071 1.75
f 1 2 3
f 3 2 4
f 1 5 2
f 2 5 6
f 2 6 4
f 4 6 7
f 4 7 3
f 3 7 8
f 3 8 1
f 1 8 5
f 8 7 5
f 5 7 6

86
tutorials/mesh/snappyHexMesh/insidePoints/system/blockMeshDict Normal file
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@ -0,0 +1,86 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
scale 1;
vertices
(
(-1 -1 -1)
(4 -1 -1)
(4 4 -1)
(-1 4 -1)
(-1 -1 4)
(4 -1 4)
(4 4 4)
(-1 4 4)
);
blocks
(
hex (0 1 2 3 4 5 6 7) (10 10 10) simpleGrading (1 1 1)
);
edges
(
);
boundary
(
frontAndBack
{
type patch;
faces
(
(3 7 6 2)
(1 5 4 0)
);
}
inlet
{
type patch;
faces
(
(0 4 7 3)
);
}
outlet
{
type patch;
faces
(
(2 6 5 1)
);
}
lowerWall
{
type patch; //wall;
faces
(
(0 3 2 1)
);
}
upperWall
{
type patch;
faces
(
(4 5 6 7)
);
}
);
// ************************************************************************* //

97
tutorials/mesh/snappyHexMesh/insidePoints/system/controlDict Normal file
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@ -0,0 +1,97 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Where to load it from (if not already in solver)
libs (fieldFunctionObjects);
DebugSwitches
{
//shortestPath 1;
}
application snappyHexMesh;
startFrom startTime;
startTime 0;
stopAt endTime;
endTime 500;
deltaT 1;
writeControl timeStep;
writeInterval 100;
purgeWrite 0;
writeFormat binary;
writePrecision 6;
writeCompression off;
timeFormat general;
timePrecision 6;
runTimeModifiable true;
functions
{
processorField
{
// Type of functionObject
type processorField;
// Where to load it from (if not already in solver)
libs (fieldFunctionObjects);
// Function object enabled flag
enabled true;
// When to output the average fields
//writeControl writeTime;
}
leakFind
{
type sets;
writeControl timeStep;
interpolationScheme cell;
setFormat vtk;
// Needs at least one field
fields ( processorID );
sets
{
leakFind
{
type shortestPath;
insidePoints ((3.0001 3.0001 0.43));
outsidePoints ((1 0 1.3));
axis xyz;
}
}
}
}
// ************************************************************************* //

23
tutorials/mesh/snappyHexMesh/insidePoints/system/decomposeParDict Normal file
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@ -0,0 +1,23 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object decomposeParDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
numberOfSubdomains 6;
method hierarchical;
n (3 2 1);
// ************************************************************************* //

46
tutorials/mesh/snappyHexMesh/insidePoints/system/fvSchemes Normal file
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@ -0,0 +1,46 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvSchemes;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
ddtSchemes
{
}
gradSchemes
{
}
divSchemes
{
}
laplacianSchemes
{
}
interpolationSchemes
{
}
snGradSchemes
{
}
wallDist
{
}
// ************************************************************************* //

18
tutorials/mesh/snappyHexMesh/insidePoints/system/fvSolution Normal file
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@ -0,0 +1,18 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// ************************************************************************* //

24
tutorials/mesh/snappyHexMesh/insidePoints/system/meshQualityDict Normal file
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@ -0,0 +1,24 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object meshQualityDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Include defaults parameters from master dictionary
#includeEtc "caseDicts/meshQualityDict"
//- minFaceWeight (0 -> 0.5)
minFaceWeight 0.02;
// ************************************************************************* //

331
tutorials/mesh/snappyHexMesh/insidePoints/system/snappyHexMeshDict Normal file
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@ -0,0 +1,331 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object snappyHexMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Which of the steps to run
castellatedMesh true;
snap true;
addLayers false;
// Geometry. Definition of all surfaces. All surfaces are of class
// searchableSurface.
// Surfaces are used
// - to specify refinement for any mesh cell intersecting it
// - to specify refinement for any mesh cell inside/outside/near
// - to 'snap' the mesh boundary to the surface
geometry
{
box.obj
{
type triSurfaceMesh;
name box;
}
plane.obj
{
type triSurfaceMesh;
name plane;
}
};
// Settings for the castellatedMesh generation.
castellatedMeshControls
{
// Refinement parameters
// ~~~~~~~~~~~~~~~~~~~~~
// If local number of cells is >= maxLocalCells on any processor
// switches from from refinement followed by balancing
// (current method) to (weighted) balancing before refinement.
maxLocalCells 100000;
// Overall cell limit (approximately). Refinement will stop immediately
// upon reaching this number so a refinement level might not complete.
// Note that this is the number of cells before removing the part which
// is not 'visible' from the keepPoint. The final number of cells might
// actually be a lot less.
maxGlobalCells 2000000;
// The surface refinement loop might spend lots of iterations refining just a
// few cells. This setting will cause refinement to stop if <= minimumRefine
// are selected for refinement. Note: it will at least do one iteration
// (unless the number of cells to refine is 0)
minRefinementCells 10;
// Allow a certain level of imbalance during refining
// (since balancing is quite expensive)
// Expressed as fraction of perfect balance (= overall number of cells /
// nProcs). 0=balance always.
maxLoadUnbalance 0.10;
// Number of buffer layers between different levels.
// 1 means normal 2:1 refinement restriction, larger means slower
// refinement.
nCellsBetweenLevels 3;
// Explicit feature edge refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies a level for any cell intersected by its edges.
// This is a featureEdgeMesh, read from constant/triSurface for now.
features
(
);
// Surface based refinement
// ~~~~~~~~~~~~~~~~~~~~~~~~
// Specifies two levels for every surface. The first is the minimum level,
// every cell intersecting a surface gets refined up to the minimum level.
// The second level is the maximum level. Cells that 'see' multiple
// intersections where the intersections make an
// angle > resolveFeatureAngle get refined up to the maximum level.
refinementSurfaces
{
plane
{
level (2 2);
}
box
{
// Surface-wise min and max refinement level
level (1 1);
faceZone boxFz;
cellZone boxCz;
cellZoneInside insidePoint;
insidePoints
(
(2.01 0.75 1.13) // minY of split box
(2.01 1.25 1.1) // maxY of split box
(0.01 0.01 0.01) // non-split box
(0.02 0.02 0.03) // (surplus point) non-split box
);
}
}
// Resolve sharp angles
resolveFeatureAngle 30;
// Region-wise refinement
// ~~~~~~~~~~~~~~~~~~~~~~
// Specifies refinement level for cells in relation to a surface. One of
// three modes
// - distance. 'levels' specifies per distance to the surface the
// wanted refinement level. The distances need to be specified in
// descending order.
// - inside. 'levels' is only one entry and only the level is used. All
// cells inside the surface get refined up to the level. The surface
// needs to be closed for this to be possible.
// - outside. Same but cells outside.
refinementRegions
{
}
// Mesh selection
// ~~~~~~~~~~~~~~
// After refinement patches get added for all refinementSurfaces and
// all cells intersecting the surfaces get put into these patches. The
// section reachable from the locationInMesh is kept.
// NOTE: This point should never be on a face, always inside a cell, even
// after refinement.
locationInMesh (3.0001 3.0001 0.43);
// Whether any faceZones (as specified in the refinementSurfaces)
// are only on the boundary of corresponding cellZones or also allow
// free-standing zone faces. Not used if there are no faceZones.
allowFreeStandingZoneFaces true;
// 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;
//- Relative distance for points to be attracted by surface feature point
// or edge. 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;
// 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 points on multiple surfaces (only for explicitFeatureSnap)
multiRegionFeatureSnap false;
}
// 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;
// Per final patch (so not geometry!) the layer information
layers
{
"(lowerWall|motorBike).*"
{
nSurfaceLayers 1;
}
}
// Expansion factor for layer mesh
expansionRatio 1.0;
// Wanted thickness of final added cell layer. If multiple layers
// is the thickness of the layer furthest away from the wall.
// Relative to undistorted size of cell outside layer.
// See relativeSizes parameter.
finalLayerThickness 0.3;
// Minimum thickness of cell layer. If for any reason layer
// cannot be above minThickness do not add layer.
// Relative to undistorted size of cell outside layer.
minThickness 0.1;
// 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
// When not to extrude surface. 0 is flat surface, 90 is when two faces
// are perpendicular
featureAngle 60;
// At non-patched sides allow mesh to slip if extrusion direction makes
// angle larger than slipFeatureAngle.
slipFeatureAngle 30;
// Maximum number of snapping relaxation iterations. Should stop
// before upon reaching a correct mesh.
nRelaxIter 3;
// Number of smoothing iterations of surface normals
nSmoothSurfaceNormals 1;
// Number of smoothing iterations of interior mesh movement direction
nSmoothNormals 3;
// Smooth layer thickness over surface patches
nSmoothThickness 10;
// Stop layer growth on highly warped cells
maxFaceThicknessRatio 0.5;
// Reduce layer growth where ratio thickness to medial
// distance is large
maxThicknessToMedialRatio 0.3;
// 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;
// Create buffer region for new layer terminations
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;
}
// Generic mesh quality settings. At any undoable phase these determine
// where to undo.
meshQualityControls
{
#include "meshQualityDict"
// Advanced
//- Number of error distribution iterations
nSmoothScale 4;
//- Amount to scale back displacement at error points
errorReduction 0.75;
}
// Advanced
// Format to use for lines (e.g. leak path)
setFormat ensight;
// Write flags
writeFlags
(
scalarLevels
layerSets
layerFields // write volScalarField for layer coverage
);
// Merge tolerance. Is fraction of overall bounding box of initial mesh.
// Note: the write tolerance needs to be higher than this.
mergeTolerance 1e-6;
// ************************************************************************* //

45
tutorials/mesh/snappyHexMesh/insidePoints/system/surfaceFeatureExtractDict Normal file
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@ -0,0 +1,45 @@
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2306 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object surfaceFeatureExtractDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
motorBike-wo-visor.obj
{
// How to obtain raw features (extractFromFile || extractFromSurface)
extractionMethod extractFromSurface;
// Mark edges whose adjacent surface normals are at an angle less
// than includedAngle as features
// - 0 : selects no edges
// - 180: selects all edges
includedAngle 150;
subsetFeatures
{
// Keep nonManifold edges (edges with >2 connected faces)
nonManifoldEdges no;
// Keep open edges (edges with 1 connected face)
openEdges yes;
}
// Write options
// Write features to obj format for postprocessing
writeObj yes;
}
// ************************************************************************* //