foam-extend4.1-coherent-io/applications/solvers/solidMechanics/viscoElasticSolidFoam/viscoElasticSolidFoam.C

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2004-6 H. Jasak All rights reserved
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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 2 of the License, or (at your
    option) any later version.

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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    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, write to the Free Software Foundation,
    Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Application
    viscoElasticStressedFoam

Description
    Transient/steady-state segregated finite-volume solver for small strain
    visco elastic solid bodies.

    Displacement increment field DU is solved for using a total Lagrangian
    approach, also generating the strain tensor field epsilon and stress
    tensor field sigma.


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

#include "fvCFD.H"
#include "rheologyModel.H"
#include "OFstream.H"

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

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

#   include "createTime.H"

#   include "createMesh.H"

#   include "createFields.H"

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

    Info<< "\nCalculating displacement field\n" << endl;

    lduMatrix::debug = 0;

    scalar m = 0.5;

    for (runTime++; !runTime.end(); runTime++)
    {
        Info<< "Time: " << runTime.timeName() << nl << endl;

#       include "readStressedFoamControls.H"

        volScalarField mu =
            rheology.mu(m*runTime.deltaT().value());
        volScalarField lambda =
            rheology.lambda(m*runTime.deltaT().value());

        Info << "mu = " << average(mu.internalField()) << endl;
        Info << "lambda = " << average(lambda.internalField()) << endl;

        int iCorr = 0;
        lduMatrix::solverPerformance solverPerf;
        scalar initialResidual = 0;
        scalar residual = GREAT;

        do
        {
            DU.storePrevIter();

            fvVectorMatrix DUEqn
            (
                fvm::d2dt2(rho,DU)
              ==
                fvm::laplacian(2*mu+lambda, DU, "laplacian(DDU,DU)")
              + fvc::div
                (
                    mu*gradDU.T()
                  + lambda*(I*tr(gradDU))
                  - (mu + lambda)*gradDU
                  + DSigmaCorr,
                  "div(sigma)"
                )
            );

            solverPerf = DUEqn.solve();

            DU.relax();

            if(iCorr == 0)
            {
                initialResidual = solverPerf.initialResidual();
            }

            gradDU = fvc::grad(DU);

#           include "calculateDEpsilonDSigma.H"
        }
        while
        (
            solverPerf.initialResidual() > convergenceTolerance
            && ++iCorr < nCorr
        );

        Info << "Solving for " << DU.name() << " using "
            << solverPerf.solverName() << " solver"
            << ", Initial residual = " << initialResidual
            << ", Final residual = " << solverPerf.initialResidual()
            << ", No outer iterations " << iCorr
            << ", Relative error: " << residual << endl;

        U += DU;

        epsilon += DEpsilon;

#       include "calculateSigmaDSigmaCorr.H"

#       include "writeFields.H"

        Info<< "ExecutionTime = "
            << runTime.elapsedCpuTime()
            << " s\n\n" << endl;
    }

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

    return(0);
}


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