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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::fvMeshSubset
Description
Post-processing mesh subset tool. Given the original mesh and the
list of selected cells, it creates the mesh consisting only of the
desired cells, with the mapping list for points, faces, and cells.
Puts all exposed internal faces into either
- a user supplied patch
- a newly created patch "oldInternalFaces"
- setCellSubset is for small subsets. Uses Maps to minimise memory.
- setLargeCellSubset is for largish subsets (>10% of mesh).
Uses labelLists instead.
- setLargeCellSubset does coupled patch subsetting as well. If it detects
a face on a coupled patch 'losing' its neighbour it will move the
face into the oldInternalFaces patch.
- if a user supplied patch is used it is up to the destination
patchField to handle exposed internal faces (mapping from face -1).
If not provided the default is to assign the internalField. All the
basic patch field types (e.g. fixedValue) will give a warning and
preferably derived patch field types should be used that know how to
handle exposed faces (e.g. use uniformFixedValue instead of fixedValue)
SourceFiles
fvMeshSubset.C
\*---------------------------------------------------------------------------*/
#ifndef fvMeshSubset_H
#define fvMeshSubset_H
#include "fvMesh.H"
#include "HashSet.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
class pointMesh;
class surfaceMesh;
/*---------------------------------------------------------------------------*\
Class fvMeshSubset Declaration
\*---------------------------------------------------------------------------*/
class fvMeshSubset
{
// Private Data
//- Mesh to subset from
const fvMesh& baseMesh_;
//- Subset mesh pointer
autoPtr<fvMesh> fvMeshSubsetPtr_;
//- Point mapping array
labelList pointMap_;
//- Face mapping array
labelList faceMap_;
//- Cell mapping array
labelList cellMap_;
//- Patch mapping array
labelList patchMap_;
//- Optional face mapping array with flip encoded
mutable autoPtr<labelList> faceFlipMapPtr_;
// Private Member Functions
//- Check if subset has been performed
bool checkCellSubset() const;
//- Mark points in Map
static void markPoints(const labelList&, Map<label>&);
//- Mark points (with 0) in labelList
static void markPoints(const labelList&, labelList&);
//- Adapt nCellsUsingFace for coupled faces becoming 'uncoupled'.
void doCoupledPatches
(
const bool syncPar,
Map<label>& facesToSubset,
labelList& nCellsUsingFace
) const;
//- Subset of subset
static labelList subset
(
const label nElems,
const labelList& selectedElements,
const labelList& subsetMap
);
//- Create zones for submesh
void subsetZones();
//- Helper: extract cells-to-remove from cells-to-keep
labelList getCellsToRemove
(
const labelList& region,
const label currentRegion
) const;
public:
//- Runtime type information
TypeName("fvMeshSubset");
// Constructors
//- Construct given a mesh to subset
explicit fvMeshSubset(const fvMesh&);
//- Disallow default bitwise copy construction
fvMeshSubset(const fvMeshSubset&) = delete;
//- Destructor
virtual ~fvMeshSubset();
// Member Functions
// Edit
//- Set the subset. Create "oldInternalFaces" patch for exposed
// internal faces (patchID==-1) or use supplied patch.
// Does not handle coupled patches correctly if only one side
// gets deleted.
void setCellSubset
(
const labelHashSet& globalCellMap,
const label patchID = -1,
const bool syncPar = true
);
//- Set the subset from all cells with region == currentRegion.
// Create "oldInternalFaces" patch for exposed
// internal faces (patchID==-1) or use supplied patch.
// Handles coupled patches by if necessary making coupled patch
// face part of patchID (so uncoupled)
void setLargeCellSubset
(
const labelList& region,
const label currentRegion,
const label patchID = -1,
const bool syncCouples = true
);
//- setLargeCellSubset but with labelHashSet.
void setLargeCellSubset
(
const labelHashSet& globalCellMap,
const label patchID = -1,
const bool syncPar = true
);
// Two step subsetting
//- Get labels of exposed faces.
// These are
// - internal faces that become boundary faces
// - coupled faces that become uncoupled (since one of the
// sides gets deleted)
labelList getExposedFaces
(
const labelList& region,
const label currentRegion,
const bool syncCouples = true
) const;
//- For every exposed face (from above getExposedFaces)
// used supplied (existing!) patch
void setLargeCellSubset
(
const labelList& region,
const label currentRegion,
const labelList& exposedFaces,
const labelList& patchIDs,
const bool syncCouples = true
);
// Access
//- Original mesh
const fvMesh& baseMesh() const
{
return baseMesh_;
}
//- Have subMesh?
bool hasSubMesh() const;
//- Return reference to subset mesh
const fvMesh& subMesh() const;
fvMesh& subMesh();
//- Return point map
const labelList& pointMap() const;
//- Return face map
const labelList& faceMap() const;
//- Return face map with sign to encode flipped faces
const labelList& faceFlipMap() const;
//- Return cell map
const labelList& cellMap() const;
//- Return patch map
const labelList& patchMap() const;
// Field mapping
//- Map volume field
template<class Type>
static tmp<VolField<Type>>
interpolate
(
const VolField<Type>&,
const fvMesh& sMesh,
const labelList& patchMap,
const labelList& cellMap,
const labelList& faceMap
);
template<class Type>
tmp<VolField<Type>>
interpolate
(
const VolField<Type>&
) const;
//- Map surface field. Optionally negates value if flipping
// a face (from exposing an internal face)
template<class Type>
static tmp<SurfaceField<Type>>
interpolate
(
const SurfaceField<Type>&,
const fvMesh& sMesh,
const labelList& patchMap,
const labelList& cellMap,
const labelList& faceMap
);
template<class Type>
tmp<SurfaceField<Type>>
interpolate
(
const SurfaceField<Type>&
) const;
//- Map point field
template<class Type>
static tmp<PointField<Type>>
interpolate
(
const PointField<Type>&,
const pointMesh& sMesh,
const labelList& patchMap,
const labelList& pointMap
);
template<class Type>
tmp<PointField<Type>>
interpolate
(
const PointField<Type>&
) const;
//- Map dimensioned field
template<class Type>
static tmp<DimensionedField<Type, fvMesh>>
interpolate
(
const DimensionedField<Type, fvMesh>&,
const fvMesh& sMesh,
const labelList& cellMap
);
template<class Type>
tmp<DimensionedField<Type, fvMesh>>
interpolate(const DimensionedField<Type, fvMesh>&) const;
// Member Operators
//- Disallow default bitwise assignment
void operator=(const fvMeshSubset&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#ifdef NoRepository
#include "fvMeshSubsetInterpolate.C"
#endif
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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