DICSmoother.H

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    Copyright (C) 2011 OpenFOAM Foundation
    Copyright (C) 2019 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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Class
    Foam::DICSmoother

Group
    grpLduMatrixSmoothers

Description
    Simplified diagonal-based incomplete Cholesky smoother for symmetric
    matrices.

    To improve efficiency, the residual is evaluated after every nSweeps
    sweeps.

SourceFiles
    DICSmoother.C

\*---------------------------------------------------------------------------*/

#ifndef DICSmoother_H
#define DICSmoother_H

#include "lduMatrix.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                           Class DICSmoother Declaration
\*---------------------------------------------------------------------------*/

class DICSmoother
:
    public lduMatrix::smoother
{
    // Private data

        //- The reciprocal preconditioned diagonal
        solveScalarField rD_;


public:

    //- Runtime type information
    TypeName("DIC");


    // Constructors

        //- Construct from matrix components
        DICSmoother
        (
            const word& fieldName,
            const lduMatrix& matrix,
            const FieldField<Field, scalar>& interfaceBouCoeffs,
            const FieldField<Field, scalar>& interfaceIntCoeffs,
            const lduInterfaceFieldPtrsList& interfaces,
            const dictionary& solverControls
        );


    // Member Functions

        //- Smooth the solution for a given number of sweeps
        void smooth
        (
            solveScalarField& psi,
            const scalarField& source,
            const direction cmpt,
            const label nSweeps
        ) const;

        //- Smooth the solution for a given number of sweeps
        void scalarSmooth
        (
            solveScalarField& psi,
            const solveScalarField& source,
            const direction cmpt,
            const label nSweeps
        ) const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //