procFacesGAMGProcAgglomeration.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2013 OpenFOAM Foundation
    Copyright (C) 2023 OpenCFD Ltd.
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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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    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
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Class
    Foam::procFacesGAMGProcAgglomeration
 
Description
    Processor agglomeration of GAMGAgglomerations. Needs nAgglomeratingCells
    which is when to start agglomerating processors. Processors get agglomerated
    by constructing a single cell mesh for each processor with each
    processor interface a face. This then gets agglomerated using
    the pairGAMGAgglomeration algorithm with the number of faces
    on the original processor interface as face weight.
 
SourceFiles
    procFacesGAMGProcAgglomeration.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_procFacesGAMGProcAgglomeration_H
#define Foam_procFacesGAMGProcAgglomeration_H
 
#include "GAMGProcAgglomeration.H"
#include "labelField.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                    Class procFacesGAMGProcAgglomeration Declaration
\*---------------------------------------------------------------------------*/
 
class procFacesGAMGProcAgglomeration
:
    public GAMGProcAgglomeration
{
    // Private Data
 
        //- When to processor agglomerate
        const label nAgglomeratingCells_;
 
 
    // Private Member Functions
 
        //- Return (on master) all single-cell meshes collected. single-cell
        //  meshes are just one cell with all proc faces intact.
        autoPtr<lduPrimitiveMesh> singleCellMesh
        (
            const label singleCellMeshComm,
            const lduMesh& mesh,
            scalarField& faceWeights
        ) const;
 
        //- Construct processor agglomeration: for every processor the
        //  coarse processor-cluster it agglomerates onto
        tmp<labelField> processorAgglomeration(const lduMesh&) const;
 
        //- Do we need to agglomerate across processors?
        bool doProcessorAgglomeration(const lduMesh&) const;
 
 
public:
 
    //- Runtime type information
    TypeName("procFaces");
 
    //- No copy construct
    procFacesGAMGProcAgglomeration(const procFacesGAMGProcAgglomeration&)
        = delete;
 
    //- No copy assignment
    void operator=(const procFacesGAMGProcAgglomeration&) = delete;
 
 
    // Constructors
 
        //- Construct given agglomerator and controls
        procFacesGAMGProcAgglomeration
        (
            GAMGAgglomeration& agglom,
            const dictionary& controlDict
        );
 
 
    //- Destructor
    virtual ~procFacesGAMGProcAgglomeration();
 
 
    // Member Functions
 
        //- Modify agglomeration. Return true if modified
        virtual bool agglomerate();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //