201 lines
6.1 KiB
C
201 lines
6.1 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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PDRFoam
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Description
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Compressible premixed/partially-premixed combustion solver with turbulence
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modelling.
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Combusting RANS code using the b-Xi two-equation model.
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Xi may be obtained by either the solution of the Xi transport
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equation or from an algebraic exression. Both approaches are
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based on Gulder's flame speed correlation which has been shown
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to be appropriate by comparison with the results from the
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spectral model.
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Strain effects are encorporated directly into the Xi equation
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but not in the algebraic approximation. Further work need to be
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done on this issue, particularly regarding the enhanced removal rate
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caused by flame compression. Analysis using results of the spectral
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model will be required.
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For cases involving very lean Propane flames or other flames which are
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very strain-sensitive, a transport equation for the laminar flame
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speed is present. This equation is derived using heuristic arguments
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involving the strain time scale and the strain-rate at extinction.
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the transport velocity is the same as that for the Xi equation.
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For large flames e.g. explosions additional modelling for the flame
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wrinkling due to surface instabilities may be applied.
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PDR (porosity/distributed resistance) modelling is included to handle
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regions containing blockages which cannot be resolved by the mesh.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "dynamicFvMesh.H"
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#include "hhuCombustionThermo.H"
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#include "RASModel.H"
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#include "laminarFlameSpeed.H"
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#include "XiModel.H"
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#include "PDRDragModel.H"
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#include "ignition.H"
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#include "Switch.H"
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#include "bound.H"
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#include "dynamicRefineFvMesh.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 "createDynamicFvMesh.H"
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# include "readCombustionProperties.H"
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# include "readGravitationalAcceleration.H"
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# include "createFields.H"
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# include "readPISOControls.H"
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# include "initContinuityErrs.H"
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# include "readTimeControls.H"
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# include "setInitialDeltaT.H"
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scalar StCoNum = 0.0;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Info<< "\nStarting time loop\n" << endl;
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while (runTime.run())
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{
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# include "readTimeControls.H"
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# include "readPISOControls.H"
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# include "CourantNo.H"
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# include "setDeltaT.H"
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runTime++;
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Info<< "\n\nTime = " << runTime.timeName() << endl;
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// Indicators for refinement. Note: before runTime++
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// only for postprocessing reasons.
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tmp<volScalarField> tmagGradP = mag(fvc::grad(p));
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volScalarField normalisedGradP
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(
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"normalisedGradP",
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tmagGradP()/max(tmagGradP())
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);
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normalisedGradP.writeOpt() = IOobject::AUTO_WRITE;
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tmagGradP.clear();
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bool meshChanged = false;
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{
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// Make the fluxes absolute
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fvc::makeAbsolute(phi, rho, U);
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// Test : disable refinement for some cells
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PackedBoolList& protectedCell =
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refCast<dynamicRefineFvMesh>(mesh).protectedCell();
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if (protectedCell.empty())
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{
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protectedCell.setSize(mesh.nCells());
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protectedCell = 0;
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}
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forAll(betav, cellI)
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{
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if (betav[cellI] < 0.99)
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{
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protectedCell[cellI] = 1;
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}
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}
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//volScalarField pIndicator("pIndicator",
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// p*(fvc::laplacian(p))
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// / (
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// magSqr(fvc::grad(p))
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// + dimensionedScalar
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// (
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// "smallish",
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// sqr(p.dimensions()/dimLength),
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// 1E-6
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// )
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// ));
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//pIndicator.writeOpt() = IOobject::AUTO_WRITE;
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// Flux estimate for introduced faces.
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volVectorField rhoU("rhoU", rho*U);
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// Do any mesh changes
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meshChanged = mesh.update();
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// if (mesh.moving() || meshChanged)
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// {
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//# include "correctPhi.H"
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// }
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// Make the fluxes relative to the mesh motion
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fvc::makeRelative(phi, rho, U);
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}
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# include "rhoEqn.H"
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# include "UEqn.H"
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// --- PISO loop
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for (int corr=1; corr<=nCorr; corr++)
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{
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# include "bEqn.H"
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# include "ftEqn.H"
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# include "huEqn.H"
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# include "hEqn.H"
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if (!ign.ignited())
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{
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hu == h;
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}
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# include "pEqn.H"
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}
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turbulence->correct();
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runTime.write();
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Info<< "\nExecutionTime = "
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<< runTime.elapsedCpuTime()
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<< " s\n" << endl;
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}
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Info<< "\n end\n";
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return 0;
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}
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// ************************************************************************* //
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