LduMatrixSolver.C

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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2019-2021 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
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    the Free Software Foundation, either version 3 of the License, or
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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.
 
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#include "LduMatrix.H"
#include "DiagonalSolver.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class Type, class DType, class LUType>
Foam::autoPtr<typename Foam::LduMatrix<Type, DType, LUType>::solver>
Foam::LduMatrix<Type, DType, LUType>::solver::New
(
    const word& fieldName,
    const LduMatrix<Type, DType, LUType>& matrix,
    const dictionary& solverDict
)
{
    const word solverName(solverDict.get<word>("solver"));
 
    if (matrix.diagonal())
    {
        return autoPtr<typename LduMatrix<Type, DType, LUType>::solver>
        (
            new DiagonalSolver<Type, DType, LUType>
            (
                fieldName,
                matrix,
                solverDict
            )
        );
    }
    else if (matrix.symmetric())
    {
        auto* ctorPtr = symMatrixConstructorTable(solverName);
 
        if (!ctorPtr)
        {
            FatalIOErrorInLookup
            (
                solverDict,
                "symmetric matrix solver",
                solverName,
                *symMatrixConstructorTablePtr_
            ) << exit(FatalIOError);
        }
 
        return autoPtr<typename LduMatrix<Type, DType, LUType>::solver>
        (
            ctorPtr
            (
                fieldName,
                matrix,
                solverDict
            )
        );
    }
    else if (matrix.asymmetric())
    {
        auto* ctorPtr = asymMatrixConstructorTable(solverName);
 
        if (!ctorPtr)
        {
            FatalIOErrorInLookup
            (
                solverDict,
                "asymmetric matrix solver",
                solverName,
                *asymMatrixConstructorTablePtr_
            ) << exit(FatalIOError);
        }
 
        return autoPtr<typename LduMatrix<Type, DType, LUType>::solver>
        (
            ctorPtr
            (
                fieldName,
                matrix,
                solverDict
            )
        );
    }
 
    FatalIOErrorInFunction(solverDict)
        << "cannot solve incomplete matrix, "
           "no diagonal or off-diagonal coefficient"
        << exit(FatalIOError);
 
    return nullptr;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class Type, class DType, class LUType>
Foam::LduMatrix<Type, DType, LUType>::solver::solver
(
    const word& fieldName,
    const LduMatrix<Type, DType, LUType>& matrix,
    const dictionary& solverDict
)
:
    fieldName_(fieldName),
    matrix_(matrix),
 
    controlDict_(solverDict),
 
    log_(1),
    minIter_(0),
    maxIter_(defaultMaxIter_),
    tolerance_(1e-6*pTraits<Type>::one),
    relTol_(Zero)
{
    readControls();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class Type, class DType, class LUType>
void Foam::LduMatrix<Type, DType, LUType>::solver::readControls()
{
    controlDict_.readIfPresent("log", log_);
    controlDict_.readIfPresent("minIter", minIter_);
    controlDict_.readIfPresent("maxIter", maxIter_);
    controlDict_.readIfPresent("tolerance", tolerance_);
    controlDict_.readIfPresent("relTol", relTol_);
}
 
 
template<class Type, class DType, class LUType>
void Foam::LduMatrix<Type, DType, LUType>::solver::read
(
    const dictionary& solverDict
)
{
    controlDict_ = solverDict;
    readControls();
}
 
 
template<class Type, class DType, class LUType>
Type Foam::LduMatrix<Type, DType, LUType>::solver::normFactor
(
    const Field<Type>& psi,
    const Field<Type>& Apsi,
    Field<Type>& tmpField
) const
{
    // --- Calculate A dot reference value of psi
    matrix_.sumA(tmpField);
    cmptMultiply(tmpField, tmpField, gAverage(psi));
 
    return stabilise
    (
        gSum(cmptMag(Apsi - tmpField) + cmptMag(matrix_.source() - tmpField)),
        SolverPerformance<Type>::small_
    );
 
    // At convergence this simpler method is equivalent to the above
    // return stabilise(2*gSumCmptMag(matrix_.source()), matrix_.small_);
}
 
 
// ************************************************************************* //