GAMGSolverScale.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2013 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
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\*---------------------------------------------------------------------------*/
 
#include "GAMGSolver.H"
#include "vector2D.H"
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::GAMGSolver::scale
(
    scalarField& field,
    scalarField& Acf,
    const lduMatrix& A,
    const FieldField<Field, scalar>& interfaceLevelBouCoeffs,
    const lduInterfaceFieldPtrsList& interfaceLevel,
    const scalarField& source,
    const direction cmpt
) const
{
    A.Amul
    (
        Acf,
        field,
        interfaceLevelBouCoeffs,
        interfaceLevel,
        cmpt
    );
 
    scalar scalingFactorNum = 0.0;
    scalar scalingFactorDenom = 0.0;
 
    forAll(field, i)
    {
        scalingFactorNum += source[i]*field[i];
        scalingFactorDenom += Acf[i]*field[i];
    }
 
    vector2D scalingVector(scalingFactorNum, scalingFactorDenom);
    A.mesh().reduce(scalingVector, sumOp<vector2D>());
 
    scalar sf = scalingVector.x()/stabilise(scalingVector.y(), VSMALL);
 
    if (debug >= 2)
    {
        Pout<< sf << " ";
    }
 
    const scalarField& D = A.diag();
 
    forAll(field, i)
    {
        field[i] = sf*field[i] + (source[i] - sf*Acf[i])/D[i];
    }
}
 
 
// ************************************************************************* //