GAMGPreconditioner.H

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    Copyright (C) 2019 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
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Class
    Foam::GAMGPreconditioner
 
Group
    grpLduMatrixPreconditioners
 
Description
    Geometric agglomerated algebraic multigrid preconditioner.
 
See also
    GAMGSolver for more details.
 
SourceFiles
    GAMGPreconditioner.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef GAMGPreconditioner_H
#define GAMGPreconditioner_H
 
#include "GAMGSolver.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class GAMGPreconditioner Declaration
\*---------------------------------------------------------------------------*/
 
class GAMGPreconditioner
:
    public GAMGSolver,
    public lduMatrix::preconditioner
{
protected:
    // Protected data
 
        //- Number of V-cycles to perform
        label nVcycles_;
 
        //- Read the control parameters from the controlDict_
        virtual void readControls();
 
public:
 
    //- Runtime type information
    TypeName("GAMG");
 
 
    // Constructors
 
        //- Construct from matrix components and preconditioner solver controls
        GAMGPreconditioner
        (
            const lduMatrix::solver&,
            const dictionary& solverControls
        );
 
 
    //- Destructor
    virtual ~GAMGPreconditioner();
 
 
    // Member Functions
 
        //- Return wA the preconditioned form of residual rA
        virtual void precondition
        (
            solveScalarField& wA,
            const solveScalarField& rA,
            const direction cmpt=0
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //