interFoam.C

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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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    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/>.

Application
    interFoam

Description
    Solver for 2 incompressible, isothermal immiscible fluids using a VOF
    (volume of fluid) phase-fraction based interface capturing approach,
    with optional mesh motion and mesh topology changes including adaptive
    re-meshing.

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

#include "fvCFD.H"
#include "interfaceCompression.H"
#include "CMULES.H"
#include "EulerDdtScheme.H"
#include "localEulerDdtScheme.H"
#include "CrankNicolsonDdtScheme.H"
#include "subCycle.H"
#include "immiscibleIncompressibleTwoPhaseMixture.H"
#include "noPhaseChange.H"
#include "incompressibleInterPhaseTransportModel.H"
#include "pimpleControl.H"
#include "pressureReference.H"
#include "fvModels.H"
#include "fvConstraints.H"
#include "CorrectPhi.H"
#include "fvcSmooth.H"

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

int main(int argc, char *argv[])
{
    #include "postProcess.H"

    #include "setRootCaseLists.H"
    #include "createTime.H"
    #include "createMesh.H"
    #include "initContinuityErrs.H"
    #include "createDyMControls.H"
    #include "createFields.H"
    #include "createFieldRefs.H"
    #include "initCorrectPhi.H"
    #include "createUfIfPresent.H"

    if (!LTS)
    {
        #include "CourantNo.H"
        #include "setInitialDeltaT.H"
    }

    // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
    Info<< "\nStarting time loop\n" << endl;

    while (pimple.run(runTime))
    {
        #include "readDyMControls.H"

        if (LTS)
        {
            #include "setRDeltaT.H"
        }
        else
        {
            #include "CourantNo.H"
            #include "alphaCourantNo.H"
            #include "setDeltaT.H"
        }

        fvModels.preUpdateMesh();

        // Store divU from the previous mesh so that it can be mapped
        // and used in correctPhi to ensure the corrected phi has the
        // same divergence
        tmp<volScalarField> divU;

        if
        (
            correctPhi
         && !isType<twoPhaseChangeModels::noPhaseChange>(phaseChange)
         && mesh.topoChanged()
        )
        {
            // Construct and register divU for correctPhi
            divU = new volScalarField
            (
                "divU0",
                fvc::div(fvc::absolute(phi, U))
            );
        }

        // Update the mesh for topology change, mesh to mesh mapping
        bool topoChanged = mesh.update();

        // Do not apply previous time-step mesh compression flux
        // if the mesh topology changed
        if (topoChanged)
        {
            talphaPhi1Corr0.clear();
        }

        runTime++;

        Info<< "Time = " << runTime.userTimeName() << nl << endl;

        // --- Pressure-velocity PIMPLE corrector loop
        while (pimple.loop())
        {
            if (pimple.firstPimpleIter() || moveMeshOuterCorrectors)
            {
                if
                (
                    correctPhi
                 && !isType<twoPhaseChangeModels::noPhaseChange>(phaseChange)
                 && !divU.valid()
                )
                {
                    // Construct and register divU for correctPhi
                    divU = new volScalarField
                    (
                        "divU0",
                        fvc::div(fvc::absolute(phi, U))
                    );
                }

                // Move the mesh
                mesh.move();

                if (mesh.changing())
                {
                    gh = (g & mesh.C()) - ghRef;
                    ghf = (g & mesh.Cf()) - ghRef;

                    MRF.update();

                    if (correctPhi)
                    {
                        #include "correctPhi.H"
                    }

                    mixture.correct();

                    if (checkMeshCourantNo)
                    {
                        #include "meshCourantNo.H"
                    }
                }

                divU.clear();
            }

            fvModels.correct();

            surfaceScalarField rhoPhi
            (
                IOobject
                (
                    "rhoPhi",
                    runTime.timeName(),
                    mesh
                ),
                mesh,
                dimensionedScalar(dimMass/dimTime, 0)
            );

            #include "alphaControls.H"
            #include "alphaEqnSubCycle.H"

            turbulence.correctPhasePhi();

            mixture.correct();

            #include "UEqn.H"

            // --- Pressure corrector loop
            while (pimple.correct())
            {
                #include "pEqn.H"
            }

            if (pimple.turbCorr())
            {
                turbulence.correct();
            }
        }

        runTime.write();

        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
    }

    Info<< "End\n" << endl;

    return 0;
}


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