foam-extend4.1-coherent-io/applications/solvers/incompressible/nonNewtonianIcoFoam/nonNewtonianIcoFoam.C

/*---------------------------------------------------------------------------*\
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License
    This file is part of foam-extend.

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Application
    nonNewtonianIcoFoam

Description
    Transient solver for incompressible, laminar flow of non-Newtonian fluids.
    Consistent formulation without time-step and relaxation dependence by Jasak
    and Tukovic.

Author
    Hrvoje Jasak, Wikki Ltd.  All rights reserved

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

#include "fvCFD.H"
#include "singlePhaseTransportModel.H"
#include "pisoControl.H"

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

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

#   include "createTime.H"
#   include "createMesh.H"

    pisoControl piso(mesh);

#   include "createFields.H"
#   include "initContinuityErrs.H"

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

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

    while (runTime.loop())
    {
        Info<< "Time = " << runTime.timeName() << nl << endl;

#       include "CourantNo.H"

        fluid.correct();

        // Time-derivative matrix
        fvVectorMatrix ddtUEqn(fvm::ddt(U));

        // Convection-diffusion matrix
        fvVectorMatrix HUEqn
        (
            fvm::div(phi, U)
          - fvm::laplacian(fluid.nu(), U)
        );

        if (piso.momentumPredictor())
        {
            solve(ddtUEqn + HUEqn == -fvc::grad(p));
        }

        // Prepare clean 1/a_p without time derivative contribution
        volScalarField rAU = 1.0/HUEqn.A();

        // --- PISO loop

        while (piso.correct())
        {
            // Calculate U from convection-diffusion matrix
            U = rAU*HUEqn.H();

            // Consistently calculate flux
            piso.calcTransientConsistentFlux(phi, U, rAU, ddtUEqn);

            adjustPhi(phi, U, p);

            while (piso.correctNonOrthogonal())
            {
                fvScalarMatrix pEqn
                (
                    fvm::laplacian
                    (
                        fvc::interpolate(rAU)/piso.aCoeff(),
                        p,
                        "laplacian(rAU," + p.name() + ')'
                    )
                 ==
                    fvc::div(phi)
                );

                pEqn.setReference(pRefCell, pRefValue);
                pEqn.solve
                (
                    mesh.solutionDict().solver(p.select(piso.finalInnerIter()))
                );

                if (piso.finalNonOrthogonalIter())
                {
                    phi -= pEqn.flux();
                }
            }

#           include "continuityErrs.H"

            // Consistently reconstruct velocity after pressure equation
            piso.reconstructTransientVelocity(U, phi, ddtUEqn, rAU, p);
        }

        runTime.write();

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

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

    return 0;
}


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