OpenFOAM-dev / data /src /meshTools /cellsToCells /cellsToCellsExtrapolation /multiNearest /multiNearestCellsToCellsExtrapolation.H
| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 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. | |
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| 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::cellsToCellsExtrapolations::multiNearest | |
| Description | |
| Extrapolation procedure for cells-to-cells interpolations which constructs | |
| a value for an unmapped cell as a weighted sum of values from multiple | |
| nearest mapped cells. | |
| The faces separating mapped and unmapped regions are separated into | |
| contiguous sets. Each unmapped cell then finds the nearest mapped cell | |
| adjacent to each set. Values are then interpolated from these multiple | |
| nearest cells using an inverse-distance weighting. | |
| This method is useful when mesh-to-mesh mapping opens up a new connection | |
| between previously disconnected regions of mesh (e.g., when a valve opens | |
| in an engine simulation). In this case, this method linearly interpolates | |
| the values along any newly created channels. This prevents discontinuities | |
| and minimises problematic transients that result from the mapping | |
| procedure. | |
| SourceFiles | |
| multiNearestCellsToCellsExtrapolation.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| class distributionMap; | |
| namespace cellsToCellsExtrapolations | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class multiNearest Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class multiNearest | |
| : | |
| public cellsToCellsExtrapolation | |
| { | |
| // Private Data | |
| //- For each uncoupled cell, the indices of the local cells which are | |
| // extrapolated from | |
| labelListList uncoupledCellLocalCells_; | |
| //- For each uncoupled cell, the extrapolation weights | |
| scalarListList uncoupledCellWeights_; | |
| //- Map from cells to local extrapolation cells | |
| autoPtr<distributionMap> extrapolationMapPtr_; | |
| // Private Member Functions | |
| //- Extrapolate the given field if necessary | |
| template<class Type> | |
| void extrapolateType(Field<Type>& fld) const; | |
| public: | |
| //- Run-time type information | |
| TypeName("multiNearest"); | |
| // Constructors | |
| //- Default construct | |
| multiNearest(); | |
| //- Destructor | |
| virtual ~multiNearest(); | |
| // Member Functions | |
| //- Compute the extrapolation addressing if necessary | |
| void update | |
| ( | |
| const polyMesh& mesh, | |
| const PackedBoolList& cellCoupleds | |
| ); | |
| //- Extrapolate the given field if necessary | |
| FOR_ALL_FIELD_TYPES(declareExtrapolateType); | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace cellsToCellsExtrapolations | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |