213 lines
6.3 KiB
C
213 lines
6.3 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM 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
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 OpenFOAM. 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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Solver for compressible premixed/partially-premixed combustion with
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turbulence 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 incorporated 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 "psiuReactionThermo.H"
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#include "turbulentFluidThermoModel.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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#include "pimpleControl.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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pimpleControl pimple(mesh);
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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 "initContinuityErrs.H"
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#include "createTimeControls.H"
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#include "compressibleCourantNo.H"
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#include "setInitialDeltaT.H"
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turbulence->validate();
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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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bool hasChanged = false;
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while (runTime.run())
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{
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#include "readTimeControls.H"
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#include "compressibleCourantNo.H"
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#include "setDeltaT.H"
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// Indicators for refinement. Note: before runTime++
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// only for post-processing 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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runTime++;
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Info<< "\n\nTime = " << runTime.timeName() << endl;
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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 = false;
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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.set(celli);
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}
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}
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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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bool meshChanged = mesh.update();
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if (meshChanged)
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{
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hasChanged = true;
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}
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if (runTime.write() && hasChanged)
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{
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betav.write();
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Lobs.write();
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CT.write();
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drag->writeFields();
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flameWrinkling->writeFields();
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hasChanged = false;
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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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// --- Pressure-velocity PIMPLE corrector loop
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while (pimple.loop())
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{
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#include "UEqn.H"
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// --- Pressure corrector loop
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while (pimple.correct())
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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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if (pimple.turbCorr())
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{
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turbulence->correct();
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}
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}
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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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