c3ee2348a6
fvOptions does not have the appropriate structure to support MRF as it is based on option selection by user-specified fields whereas MRF MUST be applied to all velocity fields in the particular solver. A consequence of the particular design choices in fvOptions made it difficult to support MRF for multiphase and it is easier to support frame-related and field related options separately. Currently the MRF functionality provided supports only rotations but the structure will be generalized to support other frame motions including linear acceleration, SRF rotation and 6DoF which will be run-time selectable.
159 lines
5.1 KiB
C
159 lines
5.1 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) 2011-2015 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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The fields used by this solver are:
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betav: Volume porosity
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Lobs: Average diameter of obstacle in cell (m)
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Aw: Obstacle surface area per unit volume (1/m)
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CR: Drag tensor (1/m)
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CT: Turbulence generation parameter (1/m)
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Nv: Number of obstacles in cell per unit volume (m^-2)
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nsv: Tensor whose diagonal indicates the number to substract from
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Nv to get the number of obstacles crossing the flow in each
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direction.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.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 "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 "createMesh.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 "createMRF.H"
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#include "initContinuityErrs.H"
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#include "readTimeControls.H"
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#include "compressibleCourantNo.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 "compressibleCourantNo.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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#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 "EauEqn.H"
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#include "EaEqn.H"
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if (!ign.ignited())
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{
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thermo.heu() == thermo.he();
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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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