156 lines
4.8 KiB
C
156 lines
4.8 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration |
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\\ / A nd | For copyright notice see file Copyright
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Application
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blockCoupledScalarTransportFoam
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Description
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Solves two coupled transport equations in a block-coupled manner
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1) transport equation for a passive scalar
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2) diffusion only
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This resembles heat exchanging flow through a porous medium
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "fieldTypes.H"
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#include "Time.H"
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#include "fvMesh.H"
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#include "blockLduSolvers.H"
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#include "VectorNFieldTypes.H"
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#include "volVectorNFields.H"
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#include "blockVectorNMatrices.H"
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#include "blockMatrixTools.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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# include "setRootCase.H"
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# include "createTime.H"
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# include "createMesh.H"
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# include "createFields.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Info<< "\nCalculating scalar transport\n" << endl;
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# include "CourantNo.H"
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for (runTime++; !runTime.end(); runTime++)
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{
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Info<< "Time = " << runTime.timeName() << nl << endl;
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# include "readSIMPLEControls.H"
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for (int nonOrth=0; nonOrth<=nNonOrthCorr; nonOrth++)
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{
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fvScalarMatrix TEqn
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(
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fvm::div(phi, T)
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- fvm::laplacian(DT, T)
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==
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alpha*Ts
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- fvm::Sp(alpha, T)
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);
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TEqn.relax();
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fvScalarMatrix TsEqn
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(
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- fvm::laplacian(DTs, Ts)
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==
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alpha*T
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- fvm::Sp(alpha, Ts)
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);
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TsEqn.relax();
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// Prepare block system
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BlockLduMatrix<vector2> blockM(mesh);
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//- Transfer the coupled interface list for processor/cyclic/etc.
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// boundaries
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blockM.interfaces() = blockT.boundaryField().blockInterfaces();
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// Grab block diagonal and set it to zero
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Field<tensor2>& d = blockM.diag().asSquare();
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d = tensor2::zero;
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// Grab linear off-diagonal and set it to zero
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Field<vector2>& l = blockM.lower().asLinear();
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Field<vector2>& u = blockM.upper().asLinear();
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u = vector2::zero;
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l = vector2::zero;
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vector2Field& blockX = blockT.internalField();
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vector2Field blockB(mesh.nCells(), vector2::zero);
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//- Inset equations into block Matrix
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blockMatrixTools::insertEquation(0, TEqn, blockM, blockX, blockB);
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blockMatrixTools::insertEquation(1, TsEqn, blockM, blockX, blockB);
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//- Add off-diagonal terms and remove from block source
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forAll(d, i)
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{
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d[i](0, 1) = -alpha.value()*mesh.V()[i];
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d[i](1, 0) = -alpha.value()*mesh.V()[i];
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blockB[i][0] -= alpha.value()*blockX[i][1]*mesh.V()[i];
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blockB[i][1] -= alpha.value()*blockX[i][0]*mesh.V()[i];
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}
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//- Block coupled solver call
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BlockSolverPerformance<vector2> solverPerf =
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BlockLduSolver<vector2>::New
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(
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blockT.name(),
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blockM,
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mesh.solutionDict().solver(blockT.name())
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)->solve(blockX, blockB);
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solverPerf.print();
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// Retrieve solution
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blockMatrixTools::blockRetrieve(0, T.internalField(), blockX);
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blockMatrixTools::blockRetrieve(1, Ts.internalField(), blockX);
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T.correctBoundaryConditions();
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Ts.correctBoundaryConditions();
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}
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runTime.write();
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}
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Info<< "End\n" << endl;
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return(0);
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}
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// ************************************************************************* //
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