applications/solvers/solidMechanics/elasticSolidFoam/elasticSolidFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
   3   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   4    \\    /   O peration     |
   5     \\  /    A nd           | Copyright (C) 2004-2007 Hrvoje Jasak
   6      \\/     M anipulation  |
   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM 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 2 of the License, or (at your
  14     option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM; if not, write to the Free Software Foundation,
  23     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24
  25 Application
  26     elasticSolidFoam
  27
  28 Description
  29     Transient/steady-state segregated finite-volume solver for small strain
  30     elastic solid bodies.
  31
  32     Displacement field U is solved for using a total Lagrangian approach,
  33     also generating the strain tensor field epsilon and stress tensor
  34     field sigma.
  35
  36     With optional multi-material solid interface correction ensuring
  37     correct tractions on multi-material interfaces
  38
  39 Author
  40     Philip Cardiff
  41     multi-material by Tukovic et al. 2012
  42
  43 \*---------------------------------------------------------------------------*/
  44
  45 #include "fvCFD.H"
  46 #include "constitutiveModel.H"
  47 #include "solidInterface.H"
  48
  49 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  50
  51 int main(int argc, char *argv[])
  52 {
  53 # include "setRootCase.H"
  54 # include "createTime.H"
  55 # include "createMesh.H"
  56 # include "createFields.H"
  57 # include "createHistory.H"
  58 # include "readDivSigmaExpMethod.H"
  59 # include "createSolidInterfaceNoModify.H"
  60
  61 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  62
  63   Info<< "\nStarting time loop\n" << endl;
  64
  65   while(runTime.loop())
  66     {
  67       Info<< "Time: " << runTime.timeName() << nl << endl;
  68
  69 #     include "readSolidMechanicsControls.H"
  70
  71       int iCorr = 0;
  72       lduMatrix::solverPerformance solverPerf;
  73       scalar initialResidual = 1.0;
  74       scalar relativeResidual = 1.0;
  75       lduMatrix::debug = 0;
  76
  77       if (predictor)
  78         {
  79             Info << "\nPredicting U, gradU and snGradU based on V,"
  80                  << "gradV and snGradV\n" << endl;
  81             U += V*runTime.deltaT();
  82             gradU += gradV*runTime.deltaT();
  83             snGradU += snGradV*runTime.deltaT();
  84         }
  85
  86       do
  87         {
  88             U.storePrevIter();
  89
  90 #         include "calculateDivSigmaExp.H"
  91
  92             // linear momentum equation
  93             fvVectorMatrix UEqn
  94                 (
  95                     rho*fvm::d2dt2(U)
  96                     ==
  97                     fvm::laplacian(2*muf + lambdaf, U, "laplacian(DU,U)")
  98                     + divSigmaExp
  99                     );
 100
 101             if (solidInterfaceCorr)
 102             {
 103                 solidInterfacePtr->correct(UEqn);
 104             }
 105
 106 //        if (relaxEqn)
 107 //          {
 108 //            UEqn.relax();
 109 //          }
 110
 111             solverPerf = UEqn.solve();
 112
 113             if (iCorr == 0)
 114             {
 115                 initialResidual = solverPerf.initialResidual();
 116                 aitkenInitialRes = gMax(mag(U.internalField()));
 117             }
 118
 119             if (aitkenRelax)
 120             {
 121 #             include "aitkenRelaxation.H"
 122             }
 123             else
 124             {
 125                 U.relax();
 126             }
 127
 128             gradU = fvc::grad(U);
 129
 130 #         include "calculateRelativeResidual.H"
 131
 132             if (iCorr % infoFrequency == 0)
 133             {
 134                 Info<< "\tTime " << runTime.value()
 135                     << ", Corrector " << iCorr
 136                     << ", Solving for " << U.name()
 137                     << " using " << solverPerf.solverName()
 138                     << ", res = " << solverPerf.initialResidual()
 139                     << ", rel res = " << relativeResidual;
 140                 if (aitkenRelax)
 141                 {
 142                     Info<< ", aitken = " << aitkenTheta;
 143                 }
 144                 Info<< ", inner iters = " << solverPerf.nIterations() << endl;
 145             }
 146         }
 147       while
 148           (
 149               iCorr++ == 0
 150               ||
 151               (solverPerf.initialResidual() > convergenceTolerance
 152                //relativeResidual > convergenceTolerance
 153                &&
 154                iCorr < nCorr)
 155               );
 156
 157       Info<< nl << "Time " << runTime.value() << ", Solving for " << U.name()
 158           << ", Initial residual = " << initialResidual
 159           << ", Final residual = " << solverPerf.initialResidual()
 160           << ", Relative residual = " << relativeResidual
 161           << ", No outer iterations " << iCorr
 162           << nl << "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
 163           << "  ClockTime = " << runTime.elapsedClockTime() << " s"
 164           << endl;
 165
 166       if (predictor)
 167       {
 168           V = fvc::ddt(U);
 169           gradV = fvc::ddt(gradU);
 170           snGradV = (snGradU - snGradU.oldTime())/runTime.deltaT();
 171       }
 172
 173 #     include "calculateEpsilonSigma.H"
 174 #     include "writeFields.H"
 175 #     include "writeHistory.H"
 176
 177       Info<< "ExecutionTime = "
 178           << runTime.elapsedCpuTime()
 179           << " s\n\n" << endl;
 180     }
 181
 182   Info<< "End\n" << endl;
 183
 184   return(0);
 185 }
 186
 187
 188 // ************************************************************************* //