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combustion
PDRFoam
PDRFoamAutoRefine.C
Go to the documentation of this file.
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/*---------------------------------------------------------------------------*\
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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) 1991-2010 OpenCFD Ltd.
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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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Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 <
finiteVolume/fvCFD.H
>
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#include <
dynamicFvMesh/dynamicFvMesh.H
>
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#include <
reactionThermophysicalModels/hhuCombustionThermo.H
>
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#include <
compressibleRASModels/RASModel.H
>
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#include <
laminarFlameSpeedModels/laminarFlameSpeed.H
>
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#include "
XiModels/XiModel/XiModel.H
"
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#include "
PDRModels/dragModels/PDRDragModel/PDRDragModel.H
"
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#include <
engine/ignition.H
>
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#include <
OpenFOAM/Switch.H
>
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#include <
finiteVolume/bound.H
>
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#include <
dynamicFvMesh/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 <
OpenFOAM/setRootCase.H
>
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#include <
OpenFOAM/createTime.H
>
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#include <
dynamicFvMesh/createDynamicFvMesh.H
>
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#include "
readCombustionProperties.H
"
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#include <
finiteVolume/readGravitationalAcceleration.H
>
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#include "
createFields.H
"
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#include <
finiteVolume/initContinuityErrs.H
>
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#include <
finiteVolume/readTimeControls.H
>
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#include <
finiteVolume/CourantNo.H
>
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#include <
finiteVolume/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 <
finiteVolume/readTimeControls.H
>
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#include <
finiteVolume/readPISOControls.H
>
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#include <
finiteVolume/CourantNo.H
>
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#include "
setDeltaT.H
"
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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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runTime++;
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Info
<<
"\n\nTime = "
<< runTime.timeName() <<
endl
;
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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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// ************************ vim: set sw=4 sts=4 et: ************************ //