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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Application
PDRFoam
Description
Solver for compressible premixed/partially-premixed combustion with
turbulence modelling.
Combusting RANS code using the b-Xi two-equation model.
Xi may be obtained by either the solution of the Xi transport
equation or from an algebraic exression. Both approaches are
based on Gulder's flame speed correlation which has been shown
to be appropriate by comparison with the results from the
spectral model.
Strain effects are incorporated directly into the Xi equation
but not in the algebraic approximation. Further work need to be
done on this issue, particularly regarding the enhanced removal rate
caused by flame compression. Analysis using results of the spectral
model will be required.
For cases involving very lean Propane flames or other flames which are
very strain-sensitive, a transport equation for the laminar flame
speed is present. This equation is derived using heuristic arguments
involving the strain time scale and the strain-rate at extinction.
the transport velocity is the same as that for the Xi equation.
For large flames e.g. explosions additional modelling for the flame
wrinkling due to surface instabilities may be applied.
PDR (porosity/distributed resistance) modelling is included to handle
regions containing blockages which cannot be resolved by the mesh.
\*---------------------------------------------------------------------------*/
#include "fvCFD.H"
#include "dynamicFvMesh.H"
#include "psiuReactionThermo.H"
#include "turbulentFluidThermoModel.H"
#include "laminarFlameSpeed.H"
#include "XiModel.H"
#include "PDRDragModel.H"
#include "ignition.H"
#include "Switch.H"
#include "bound.H"
#include "dynamicRefineFvMesh.H"
#include "pimpleControl.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
int main(int argc, char *argv[])
{
#include "setRootCase.H"
#include "createTime.H"
#include "createDynamicFvMesh.H"
pimpleControl pimple(mesh);
#include "readCombustionProperties.H"
#include "readGravitationalAcceleration.H"
#include "createFields.H"
#include "initContinuityErrs.H"
#include "createTimeControls.H"
#include "compressibleCourantNo.H"
#include "setInitialDeltaT.H"
turbulence->validate();
scalar StCoNum = 0.0;
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Info<< "\nStarting time loop\n" << endl;
bool hasChanged = false;
while (runTime.run())
{
#include "readTimeControls.H"
#include "compressibleCourantNo.H"
#include "setDeltaT.H"
// Indicators for refinement. Note: before runTime++
// only for postprocessing reasons.
tmp<volScalarField> tmagGradP = mag(fvc::grad(p));
volScalarField normalisedGradP
(
"normalisedGradP",
tmagGradP()/max(tmagGradP())
);
normalisedGradP.writeOpt() = IOobject::AUTO_WRITE;
tmagGradP.clear();
runTime++;
Info<< "\n\nTime = " << runTime.timeName() << endl;
{
// Make the fluxes absolute
fvc::makeAbsolute(phi, rho, U);
// Test : disable refinement for some cells
PackedBoolList& protectedCell =
refCast<dynamicRefineFvMesh>(mesh).protectedCell();
if (protectedCell.empty())
{
protectedCell.setSize(mesh.nCells());
protectedCell = 0;
}
forAll(betav, celli)
{
if (betav[celli] < 0.99)
{
protectedCell[celli] = 1;
}
}
// Flux estimate for introduced faces.
volVectorField rhoU("rhoU", rho*U);
// Do any mesh changes
bool meshChanged = mesh.update();
if (meshChanged)
{
hasChanged = true;
}
if (runTime.write() && hasChanged)
{
betav.write();
Lobs.write();
CT.write();
drag->writeFields();
flameWrinkling->writeFields();
hasChanged = false;
}
// Make the fluxes relative to the mesh motion
fvc::makeRelative(phi, rho, U);
}
#include "rhoEqn.H"
// --- Pressure-velocity PIMPLE corrector loop
while (pimple.loop())
{
#include "UEqn.H"
// --- Pressure corrector loop
while (pimple.correct())
{
#include "bEqn.H"
#include "ftEqn.H"
#include "huEqn.H"
#include "hEqn.H"
if (!ign.ignited())
{
hu == h;
}
#include "pEqn.H"
}
if (pimple.turbCorr())
{
turbulence->correct();
}
}
runTime.write();
Info<< "\nExecutionTime = "
<< runTime.elapsedCpuTime()
<< " s\n" << endl;
}
Info<< "\n end\n";
return 0;
}
// ************************************************************************* //
|
