applications/solvers/conjugate/blockCoupledScalarTransportFoam/blockCoupledScalarTransportFoam.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   5     \\  /    A nd           | Copyright held by original author
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 Application
  26     blockCoupledScalarTransportFoam
  27
  28 Description
  29     Solves two coupled transport equations in a block-coupled manner
  30
  31         1) transport equation for a passive scalar
  32         2) diffusion only
  33
  34     This resembles heat exchanging flow through a porous medium
  35
  36 \*---------------------------------------------------------------------------*/
  37
  38 #include "fvCFD.H"
  39 #include "fieldTypes.H"
  40 #include "blockLduMatrices.H"
  41 #include "blockLduSolvers.H"
  42 #include "Time.H"
  43 #include "fvMesh.H"
  44
  45 #include "blockVector2Matrix.H"
  46 #include "tensor2.H"
  47 #include "vector2Field.H"
  48 #include "tensor2Field.H"
  49 #include "blockMatrixTools.H"
  50
  51 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  52
  53 int main(int argc, char *argv[])
  54 {
  55
  56 #   include "setRootCase.H"
  57 #   include "createTime.H"
  58 #   include "createMesh.H"
  59 #   include "createFields.H"
  60
  61 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  62
  63     Info<< "\nCalculating scalar transport\n" << endl;
  64
  65 #   include "CourantNo.H"
  66
  67     for (runTime++; !runTime.end(); runTime++)
  68     {
  69         Info<< "Time = " << runTime.timeName() << nl << endl;
  70
  71 #       include "readSIMPLEControls.H"
  72
  73         for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
  74         {
  75             fvScalarMatrix TEqn
  76             (
  77                 fvm::div(phi, T)
  78               - fvm::laplacian(DT, T)
  79              ==
  80                  alpha*Ts
  81               - fvm::Sp(alpha, T)
  82             );
  83
  84             TEqn.relax();
  85
  86             fvScalarMatrix TsEqn
  87             (
  88               - fvm::laplacian(DTs, Ts)
  89              ==
  90                  alpha*T
  91               - fvm::Sp(alpha, Ts)
  92             );
  93
  94             TsEqn.relax();
  95
  96             // Prepare block system
  97             BlockLduMatrix<vector2> blockM(mesh);
  98
  99             // Grab block diagonal and set it to zero
 100             Field<tensor2>& d = blockM.diag().asSquare();
 101             d = tensor2::zero;
 102
 103             // Grab linear off-diagonal and set it to zero
 104             Field<vector2>& u = blockM.upper().asLinear();
 105             Field<vector2>& l = blockM.lower().asLinear();
 106             u = vector2::zero;
 107             l = vector2::zero;
 108
 109             vector2Field blockX(mesh.nCells(), vector2::zero);
 110             vector2Field blockB(mesh.nCells(), vector2::zero);
 111
 112             //- Inset equations into block Matrix
 113             blockMatrixTools::insertEquation(0, TEqn, blockM, blockX, blockB);
 114             blockMatrixTools::insertEquation(1, TsEqn, blockM, blockX, blockB);
 115
 116             //- Add off-diagonal terms and remove from Block source
 117             forAll(d, i)
 118             {
 119                 d[i](0,1) = -alpha.value()*mesh.V()[i];
 120                 d[i](1,0) = -alpha.value()*mesh.V()[i];
 121
 122                 blockB[i][0] -= alpha.value()*blockX[i][1]*mesh.V()[i];
 123                 blockB[i][1] -= alpha.value()*blockX[i][0]*mesh.V()[i];
 124             }
 125
 126
 127             BlockSolverPerformance<vector2> solverPerf =
 128                 BlockLduSolver<vector2>::New
 129                 (
 130                     word("blockVar"),
 131                     blockM,
 132                     mesh.solver("blockVar")
 133                 )->solve(blockX, blockB);
 134
 135             solverPerf.print();
 136
 137             // Retrieve solution
 138             blockMatrixTools::blockRetrieve(0, T.internalField(), blockX);
 139             blockMatrixTools::blockRetrieve(1, Ts.internalField(), blockX);
 140
 141             T.correctBoundaryConditions();
 142             Ts.correctBoundaryConditions();
 143         }
 144
 145         runTime.write();
 146     }
 147
 148     Info<< "End\n" << endl;
 149
 150     return(0);
 151 }
 152
 153
 154 // ************************************************************************* //