applications/solvers/solidMechanics/viscoElasticSolidFoam/viscoElasticSolidFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | foam-extend: Open Source CFD
   4    \\    /   O peration     | Version:     3.2
   5     \\  /    A nd           | Web:         http://www.foam-extend.org
   6      \\/     M anipulation  | For copyright notice see file Copyright
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of foam-extend.
  10
  11     foam-extend is free software: you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation, either version 3 of the License, or (at your
  14     option) any later version.
  15
  16     foam-extend is distributed in the hope that it will be useful, but
  17     WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19     General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 Application
  25     viscoElasticSolidFoam
  26
  27 Description
  28     visco-elastic small strain solver using finite volume method,
  29     using an incremental approach
  30
  31 Author
  32     Zeljko Tukovic FSB Zagreb
  33
  34 \*---------------------------------------------------------------------------*/
  35
  36 #include "fvCFD.H"
  37 #include "constitutiveModel.H"
  38 //#include "componentReferenceList.H"
  39 //#include "patchToPatchInterpolation.H"
  40
  41 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  42
  43 int main(int argc, char *argv[])
  44 {
  45 #   include "setRootCase.H"
  46 #   include "createTime.H"
  47 #   include "createMesh.H"
  48 #   include "createFields.H"
  49 #   include "createHistory.H"
  50
  51 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  52
  53     Info<< "\nStarting time loop\n" << endl;
  54
  55     Info<< "Note: the results must be written for every time-step"
  56         << " as they are used to calculate the current stress" << endl;
  57
  58     lduMatrix::debug = 0;
  59     scalar m = 0.5;
  60     surfaceVectorField n = mesh.Sf()/mesh.magSf();
  61
  62     while(runTime.loop())
  63     {
  64         Info<< "Time = " << runTime.timeName() << nl << endl;
  65
  66 #       include "readSolidMechanicsControls.H"
  67
  68         volScalarField mu = rheology.mu(m*runTime.deltaT().value());
  69         volScalarField lambda = rheology.lambda(m*runTime.deltaT().value());
  70         surfaceScalarField muf = fvc::interpolate(mu);
  71         surfaceScalarField lambdaf = fvc::interpolate(lambda);
  72         Info << "average mu = " << average(muf.internalField()) << endl;
  73         Info << "average lambda = " << average(lambdaf.internalField()) << endl;
  74
  75         int iCorr = 0;
  76         lduMatrix::solverPerformance solverPerf;
  77         scalar initialResidual = 1.0;
  78         scalar residual = 1.0;
  79         surfaceSymmTensorField DSigmaCorrf = fvc::interpolate(DSigmaCorr);
  80
  81         //label nCrackedFaces = 0;
  82         // cracking loop if you use cohesive boundaries
  83         //do
  84         //{
  85         do
  86         {
  87             surfaceTensorField sGradDU =
  88                 (I - n*n)&fvc::interpolate(gradDU);
  89
  90             DU.storePrevIter();
  91
  92             fvVectorMatrix DUEqn
  93             (
  94                 rho*fvm::d2dt2(DU)
  95                 ==
  96                 fvm::laplacian(2*muf+lambdaf, DU, "laplacian(DDU,DU)")
  97                 + fvc::div
  98                 (
  99                     mesh.magSf()*
 100                     (
 101                        - (muf + lambdaf)*(fvc::snGrad(DU)&(I - n*n))
 102                        + lambdaf*tr(sGradDU&(I - n*n))*n
 103                        + muf*(sGradDU&n)
 104                        + (n&DSigmaCorrf)
 105                     )
 106                 )
 107             );
 108
 109 //            // add an increment of gravity on the first time-step
 110 //            if (runTime.timeIndex() == 1)
 111 //            {
 112 //                DUEqn -= (rho*g);
 113 //            }
 114
 115             solverPerf = DUEqn.solve();
 116
 117             DU.relax();
 118
 119             if (iCorr == 0)
 120             {
 121                 initialResidual = solverPerf.initialResidual();
 122             }
 123
 124             gradDU = fvc::grad(DU);
 125
 126 #           include "calculateDSigma.H"
 127 #           include "calcResidual.H"
 128
 129             if (iCorr % infoFrequency == 0)
 130             {
 131                 Info<< "\tTime " << runTime.value()
 132                     << ", Corrector " << iCorr
 133                     << ", Solving for " << U.name()
 134                     << " using " << solverPerf.solverName()
 135                     << ", res = " << solverPerf.initialResidual()
 136                     << ", rel res = " << residual
 137                     << ", inner iters = " << solverPerf.nIterations() << endl;
 138             }
 139         }
 140         while
 141         (
 142             // solverPerf.initialResidual() > convergenceTolerance
 143             residual > convergenceTolerance
 144          && ++iCorr < nCorr
 145         );
 146
 147         Info<< "Solving for " << DU.name() << " using "
 148             << solverPerf.solverName() << " solver"
 149             << ", Initial residula = " << initialResidual
 150             << ", Final residual = " << solverPerf.initialResidual()
 151             << ", No outer iterations " << iCorr
 152             << ", Relative error: " << residual << endl;
 153
 154         //#           include "updateCrack.H"
 155         //}
 156         //while(nCrackedFaces > 0);
 157
 158         U += DU;
 159
 160 #       include "calculateSigma.H"
 161 #       include "writeFields.H"
 162 #       include "writeHistory.H"
 163
 164         Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 165             << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 166             << nl << endl;
 167     }
 168
 169     Info<< "End\n" << endl;
 170
 171     return(0);
 172 }
 173
 174
 175 // ************************************************************************* //