File size: 4,321 Bytes
5a600cf | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /*---------------------------------------------------------------------------*\
========= |
\\ / 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.
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::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
\*---------------------------------------------------------------------------*/
#ifndef multiNearestCellsToCellsExtrapolation_H
#define multiNearestCellsToCellsExtrapolation_H
#include "cellsToCellsExtrapolation.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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
#define declareExtrapolateType(Type, nullArg) \
virtual void extrapolate(Field<Type>& fld) const;
FOR_ALL_FIELD_TYPES(declareExtrapolateType);
#undef declareExtrapolateType
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace cellsToCellsExtrapolations
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
|