splitMeshRegions.C File Reference

Splits mesh into multiple regions. More...

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Detailed Description

Splits mesh into multiple regions.

Each region is defined as a domain whose cells can all be reached by cell-face-cell walking without crossing

• boundary faces
• additional faces from faceset (-blockedFaces faceSet).
• any face inbetween differing cellZones (-cellZones)

Output is:

• volScalarField with regions as different scalars (-detectOnly) or
• mesh with multiple regions or
• mesh with cells put into cellZones (-makeCellZones)

Note:

• cellZonesOnly does not do a walk and uses the cellZones only. Use this if you don't mind having disconnected domains in a single region. This option requires all cells to be in one (and one only) cellZone.

• cellZonesFileOnly behaves like -cellZonesOnly but reads the cellZones from the specified file. This allows one to explicitly specify the region distribution and still have multiple cellZones per region.

• useCellZonesOnly does not do a walk and uses the cellZones only. Use this if you don't mind having disconnected domains in a single region. This option requires all cells to be in one (and one only) cellZone.

• Should work in parallel. cellZones can differ on either side of processor boundaries in which case the faces get moved from processor patch to directMapped patch. Not very well tested.

• If a cell zone gets split into more than one region it can detect the largest matching region (-sloppyCellZones). This will accept any region that covers more than 50% of the zone. It has to be a subset so cannot have any cells in any other zone.

• writes maps like decomposePar back to original mesh:
• pointRegionAddressing : for every point in this region the point in the original mesh
• cellRegionAddressing : ,, cell,, cell,,
• faceRegionAddressing : ,, face,, face in the original mesh + 'turning index'. For a face in the same orientation this is the original facelabel+1, for a turned face this is -facelabel-1

Usage

• splitMeshRegions [OPTIONS]

Parameters:

-cellZones	Split different cell zones.
-detectOnly	Do no processing.
-blockedFaces	<faceSet name> Split at give face set.
-sloppyCellZones	Try to match regions to existing cell zones.
-makeCellZones	Create mesh with cells in different cell zones.
-overwrite	Overwrite existing data.
-case	<dir> Case directory.
-parallel	Run in parallel.
-help	Display help message.
-doc	Display Doxygen API documentation page for this application.
-srcDoc	Display Doxygen source documentation page for this application.
-insidePoint	<point> Only keep region containing specified point.
-largestOnly	Only keep largest region.

Definition in file splitMeshRegions.C.

#include "src/OpenFOAM/containers/Lists/SortableList/SortableList.H"
#include "src/OpenFOAM/global/argList/argList.H"
#include "src/meshTools/regionSplit/regionSplit.H"
#include "src/finiteVolume/fvMesh/fvMeshSubset/fvMeshSubset.H"
#include "src/OpenFOAM/db/IOobjectList/IOobjectList.H"
#include "src/finiteVolume/fields/volFields/volFields.H"
#include "src/meshTools/sets/topoSets/faceSet.H"
#include "src/meshTools/sets/topoSets/cellSet.H"
#include "src/dynamicMesh/polyTopoChange/polyTopoChange/polyTopoChange.H"
#include "src/dynamicMesh/polyTopoChange/polyTopoChange/removeCells.H"
#include "src/OpenFOAM/meshes/meshShapes/edge/EdgeMap.H"
#include "src/OpenFOAM/meshes/polyMesh/syncTools/syncTools.H"
#include "src/OpenFOAM/fields/ReadFields/ReadFields.H"
#include "src/meshTools/directMapped/directMappedPolyPatch/directMappedWallPolyPatch.H"
#include "src/finiteVolume/fields/fvPatchFields/basic/zeroGradient/zeroGradientFvPatchFields.H"
#include "src/OpenFOAM/include/setRootCase.H"
#include "src/OpenFOAM/include/createTime.H"
#include "src/OpenFOAM/include/createMesh.H"

Include dependency graph for splitMeshRegions.C:

Go to the source code of this file.