power.C

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    \\  /    A nd           | Copyright (C) 2024 OpenFOAM Foundation
     \\/     M anipulation  |
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License
    This file is part of OpenFOAM.
 
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    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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    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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
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#include "power.H"
#include "momentumTransportModel.H"
#include "surfaceInterpolate.H"
#include "fvcDiv.H"
#include "fvcGrad.H"
#include "fvcVolumeIntegrate.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
    defineTypeNameAndDebug(power, 0);
 
    addToRunTimeSelectionTable
    (
        functionObject,
        power,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * Private Static Data * * * * * * * * * * * * * * //
 
const Foam::wordList Foam::functionObjects::power::fields_
{
    "stressUSf", "divStressU", "divStressDotU", "stressDDotGradU",
    "pUSf", "divPU", "gradPU", "pDivU",
    "tauUSf", "divTauU", "divTauDotU", "tauDDotGradU"
};
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::functionObjects::power::writeFileHeader(const label i)
{
    file().setf(ios_base::fixed, ios_base::floatfield);
 
    writeHeader
    (
        file(),
        "Domain-integrated power [x " + Foam::name(1.0/factor_) + "]"
    );
    writeCommented(file(), "Time");
 
    forAll(fields_, fieldi)
    {
        // Do not write surface fields (0, 4, 8)
        if ((fieldi % 4) != 0)
        {
            writeTabbed(file(), fields_[fieldi]);
        }
    }
 
    file() << endl;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::functionObjects::power::power
(
    const word& name,
    const Time& runTime,
    const dictionary& dict
)
:
    fvMeshFunctionObject(name, runTime, dict),
    logFiles(obr_, name),
    writeLocalObjects(obr_, log),
    factor_(1e9)
{
    read(dict);
}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::functionObjects::power::~power()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
bool Foam::functionObjects::power::read(const dictionary& dict)
{
    fvMeshFunctionObject::read(dict);
    writeLocalObjects::read(dict);
 
    dict.readIfPresent("factor", factor_);
 
    resetName(typeName);
    resetLocalObjectNames(fields_);
 
    return true;
}
 
 
bool Foam::functionObjects::power::execute()
{
    const momentumTransportModel& transport =
        mesh_.lookupType<momentumTransportModel>();
 
    const volScalarField& p = mesh_.lookupObject<volScalarField>("p");
    const volVectorField& U = transport.U();
    const surfaceVectorField Uf(fvc::interpolate(U));
 
    // Deviatoric stress tensor (the spherical part is added to the pressure)
    const surfaceVectorField tauf(-transport.devTau()*mesh().magSf());
 
    // Pressure stress
    const surfaceVectorField pIf(fvc::interpolate(p)*mesh().Sf());
 
    // Full deviatoric stress tensor = tau - pI
    const surfaceVectorField stressf(tauf - pIf);
 
    store
    (
        fields_[3],
        store(fields_[1], fvc::div(store(fields_[0], stressf & Uf)))
      - store(fields_[2], fvc::div(stressf) & U)
    );
 
    store
    (
        fields_[7],
        store(fields_[5], fvc::div(store(fields_[4], -pIf & Uf)))
      - store(fields_[6], -(fvc::grad(p) & U))
    );
 
    store
    (
        fields_[11],
        store(fields_[9], fvc::div(store(fields_[8], tauf & Uf)))
      - store(fields_[10], fvc::div(tauf) & U)
    );
 
    return true;
}
 
 
bool Foam::functionObjects::power::write()
{
    Log << type() << " " << name() << " write:" << nl;
 
    writeLocalObjects::write();
 
    logFiles::write();
 
    if (Pstream::master())
    {
        writeTime(file());
    }
 
    forAll(fields_, fieldi)
    {
        if (mesh_.foundObject<volScalarField>(fields_[fieldi]))
        {
            const volScalarField& power =
                mesh_.lookupObject<volScalarField>(fields_[fieldi]);
 
            const scalar integratedPower =
                factor_*fvc::domainIntegrate(power).value();
 
            if (Pstream::master())
            {
                Log << "    " << fields_[fieldi] << ": "
                    << integratedPower << nl;
 
                file()<< tab << integratedPower;
            }
        }
    }
 
    if (Pstream::master())
    {
        Log << endl;
        file() << endl;
    }
 
    return true;
}
 
 
// ************************************************************************* //