lduMatrixSolver.C

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2016-2021 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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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "lduMatrix.H"
#include "diagonalSolver.H"
#include "PrecisionAdaptor.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    defineRunTimeSelectionTable(lduMatrix::solver, symMatrix);
    defineRunTimeSelectionTable(lduMatrix::solver, asymMatrix);
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
Foam::autoPtr<Foam::lduMatrix::solver> Foam::lduMatrix::solver::New
(
    const word& fieldName,
    const lduMatrix& matrix,
    const FieldField<Field, scalar>& interfaceBouCoeffs,
    const FieldField<Field, scalar>& interfaceIntCoeffs,
    const lduInterfaceFieldPtrsList& interfaces,
    const dictionary& solverControls
)
{
    const word name(solverControls.get<word>("solver"));
 
    if (matrix.diagonal())
    {
        return autoPtr<lduMatrix::solver>
        (
            new diagonalSolver
            (
                fieldName,
                matrix,
                interfaceBouCoeffs,
                interfaceIntCoeffs,
                interfaces,
                solverControls
            )
        );
    }
    else if (matrix.symmetric())
    {
        auto* ctorPtr = symMatrixConstructorTable(name);
 
        if (!ctorPtr)
        {
            FatalIOErrorInLookup
            (
                solverControls,
                "symmetric matrix solver",
                name,
                *symMatrixConstructorTablePtr_
            ) << exit(FatalIOError);
        }
 
        return autoPtr<lduMatrix::solver>
        (
            ctorPtr
            (
                fieldName,
                matrix,
                interfaceBouCoeffs,
                interfaceIntCoeffs,
                interfaces,
                solverControls
            )
        );
    }
    else if (matrix.asymmetric())
    {
        auto* ctorPtr = asymMatrixConstructorTable(name);
 
        if (!ctorPtr)
        {
            FatalIOErrorInLookup
            (
                solverControls,
                "asymmetric matrix solver",
                name,
                *asymMatrixConstructorTablePtr_
            ) << exit(FatalIOError);
        }
 
        return autoPtr<lduMatrix::solver>
        (
            ctorPtr
            (
                fieldName,
                matrix,
                interfaceBouCoeffs,
                interfaceIntCoeffs,
                interfaces,
                solverControls
            )
        );
    }
 
    FatalIOErrorInFunction(solverControls)
        << "cannot solve incomplete matrix, "
        "no diagonal or off-diagonal coefficient"
        << exit(FatalIOError);
 
    return nullptr;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::lduMatrix::solver::solver
(
    const word& fieldName,
    const lduMatrix& matrix,
    const FieldField<Field, scalar>& interfaceBouCoeffs,
    const FieldField<Field, scalar>& interfaceIntCoeffs,
    const lduInterfaceFieldPtrsList& interfaces,
    const dictionary& solverControls
)
:
    fieldName_(fieldName),
    matrix_(matrix),
    interfaceBouCoeffs_(interfaceBouCoeffs),
    interfaceIntCoeffs_(interfaceIntCoeffs),
    interfaces_(interfaces),
    controlDict_(solverControls),
    profiling_("lduMatrix::solver." + fieldName)
{
    readControls();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::lduMatrix::solver::readControls()
{
    log_ = controlDict_.getOrDefault<int>("log", 1);
    minIter_ = controlDict_.getOrDefault<label>("minIter", 0);
    maxIter_ = controlDict_.getOrDefault<label>("maxIter", defaultMaxIter_);
    tolerance_ = controlDict_.getOrDefault<scalar>("tolerance", 1e-6);
    relTol_ = controlDict_.getOrDefault<scalar>("relTol", 0);
}
 
 
void Foam::lduMatrix::solver::read(const dictionary& solverControls)
{
    controlDict_ = solverControls;
    readControls();
}
 
 
Foam::solverPerformance Foam::lduMatrix::solver::scalarSolve
(
    solveScalarField& psi,
    const solveScalarField& source,
    const direction cmpt
) const
{
    PrecisionAdaptor<scalar, solveScalar> tpsi_s(psi);
    return solve
    (
        tpsi_s.ref(),
        ConstPrecisionAdaptor<scalar, solveScalar>(source)(),
        cmpt
    );
}
 
 
Foam::solveScalarField::cmptType Foam::lduMatrix::solver::normFactor
(
    const solveScalarField& psi,
    const solveScalarField& source,
    const solveScalarField& Apsi,
    solveScalarField& tmpField
) const
{
    // --- Calculate A dot reference value of psi
    matrix_.sumA(tmpField, interfaceBouCoeffs_, interfaces_);
 
    tmpField *= gAverage(psi, matrix_.mesh().comm());
 
    return
        gSum
        (
            (mag(Apsi - tmpField) + mag(source - tmpField))(),
            matrix_.mesh().comm()
        )
      + solverPerformance::small_;
 
    // At convergence this simpler method is equivalent to the above
    // return 2*gSumMag(source) + solverPerformance::small_;
}
 
 
// ************************************************************************* //