wallShearStress.C

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/*---------------------------------------------------------------------------*\
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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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Application
    wallShearStress

Description
    Calculates and writes the wall shear stress, for the specified times.

Usage

    - wallShearStress [OPTIONS]

    @param -noZero \n
    Ignore timestep 0.

    @param -constant \n
    Include the constant directory.

    @param -time <time>\n
    Apply only to specific time.

    @param -latestTime \n
    Only apply to latest time step.

    @param -case <dir>\n
    Case directory.

    @param -parallel \n
    Run in parallel.

    @param -help \n
    Display help message.

    @param -doc \n
    Display Doxygen API documentation page for this application.

    @param -srcDoc \n
    Display Doxygen source documentation page for this application.

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

#include <finiteVolume/fvCFD.H>
#include <incompressibleTransportModels/singlePhaseTransportModel.H>
#include <incompressibleRASModels/RASModel.H>

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

int main(int argc, char *argv[])
{
    timeSelector::addOptions();
    #include <OpenFOAM/setRootCase.H>
    #include <OpenFOAM/createTime.H>
    instantList timeDirs = timeSelector::select0(runTime, args);
    #include <OpenFOAM/createMesh.H>

    forAll(timeDirs, timeI)
    {
        runTime.setTime(timeDirs[timeI], timeI);
        Info<< "Time = " << runTime.timeName() << endl;
        mesh.readUpdate();

        #include "createFields.H"

        volSymmTensorField Reff(RASModel->devReff());

        volVectorField wallShearStress
        (
            IOobject
            (
                "wallShearStress",
                runTime.timeName(),
                mesh,
                IOobject::NO_READ,
                IOobject::AUTO_WRITE
            ),
            mesh,
            dimensionedVector
            (
                "wallShearStress",
                Reff.dimensions(),
                vector::zero
            )
        );

        forAll(wallShearStress.boundaryField(), patchi)
        {
            wallShearStress.boundaryField()[patchi] =
            (
                -mesh.Sf().boundaryField()[patchi]
                /mesh.magSf().boundaryField()[patchi]
            ) & Reff.boundaryField()[patchi];
        }

        wallShearStress.write();
    }

    Info<< "End" << endl;

    return 0;
}


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