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combustion
XiFoam
XiFoam.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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Application
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XiFoam
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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 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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Usage
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- XiFoam [OPTION]
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@param -case <dir> \n
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Specify the case directory
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@param -parallel \n
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Run the case in parallel
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@param -help \n
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Display short usage message
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@param -doc \n
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Display Doxygen documentation page
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@param -srcDoc \n
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Display source code
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\*---------------------------------------------------------------------------*/
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#include <
finiteVolume/fvCFD.H
>
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#include <
reactionThermophysicalModels/hhuCombustionThermo.H
>
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#include <
compressibleTurbulenceModel/turbulenceModel.H
>
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#include <
laminarFlameSpeedModels/laminarFlameSpeed.H
>
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#include <
engine/ignition.H
>
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#include <
OpenFOAM/Switch.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 <
OpenFOAM/createMesh.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/compressibleCourantNo.H
>
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#include <
finiteVolume/setInitialDeltaT.H
>
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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/compressibleCourantNo.H
>
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#include <
finiteVolume/setDeltaT.H
>
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runTime++;
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Info
<<
"Time = "
<< runTime.timeName() <<
nl
<<
endl
;
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// --- Pressure-velocity PIMPLE corrector loop
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for
(
int
oCorr=0; oCorr<
nOuterCorr
; oCorr++)
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{
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#include <
finiteVolume/rhoEqn.H
>
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#include "
UEqn.H
"
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#include "
ftEqn.H
"
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#include "
bEqn.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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// --- PISO loop
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for
(
int
corr=1; corr<=
nCorr
; corr++)
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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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}
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rho
=
thermo
.
rho
();
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runTime.write();
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Info
<<
"ExecutionTime = "
<< runTime.elapsedCpuTime() <<
" s"
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<<
" ClockTime = "
<< runTime.elapsedClockTime() <<
" s"
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<<
nl
<<
endl
;
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}
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Info
<<
"End\n"
<<
endl
;
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return
0;
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}
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// ************************ vim: set sw=4 sts=4 et: ************************ //