129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
/*---------------------------------------------------------------------------*\
|
|
========= |
|
|
\\ / F ield | foam-extend: Open Source CFD
|
|
\\ / O peration |
|
|
\\ / A nd | For copyright notice see file Copyright
|
|
\\/ M anipulation |
|
|
-------------------------------------------------------------------------------
|
|
License
|
|
This file is part of foam-extend.
|
|
|
|
foam-extend 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.
|
|
|
|
foam-extend 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Application
|
|
XiFoam
|
|
|
|
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 encorporated 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.
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
#include "fvCFD.H"
|
|
#include "hhuCombustionThermo.H"
|
|
#include "turbulenceModel.H"
|
|
#include "laminarFlameSpeed.H"
|
|
#include "ignition.H"
|
|
#include "Switch.H"
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
# include "setRootCase.H"
|
|
|
|
# include "createTime.H"
|
|
# include "createMesh.H"
|
|
# include "readCombustionProperties.H"
|
|
# include "readGravitationalAcceleration.H"
|
|
# include "createFields.H"
|
|
# include "initContinuityErrs.H"
|
|
# include "readTimeControls.H"
|
|
# include "compressibleCourantNo.H"
|
|
# include "setInitialDeltaT.H"
|
|
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
|
|
|
Info<< "\nStarting time loop\n" << endl;
|
|
|
|
while (runTime.run())
|
|
{
|
|
# include "readTimeControls.H"
|
|
# include "readPISOControls.H"
|
|
# include "compressibleCourantNo.H"
|
|
# include "setDeltaT.H"
|
|
|
|
runTime++;
|
|
Info<< "Time = " << runTime.timeName() << nl << endl;
|
|
|
|
// --- Pressure-velocity PIMPLE corrector loop
|
|
for (int oCorr=0; oCorr<nOuterCorr; oCorr++)
|
|
{
|
|
# include "rhoEqn.H"
|
|
# include "UEqn.H"
|
|
|
|
# include "ftEqn.H"
|
|
# include "bEqn.H"
|
|
# include "huEqn.H"
|
|
# include "hEqn.H"
|
|
|
|
if (!ign.ignited())
|
|
{
|
|
hu == h;
|
|
}
|
|
|
|
// --- PISO loop
|
|
for (int corr=1; corr<=nCorr; corr++)
|
|
{
|
|
# include "pEqn.H"
|
|
}
|
|
|
|
turbulence->correct();
|
|
}
|
|
|
|
rho = thermo.rho();
|
|
|
|
runTime.write();
|
|
|
|
Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
|
|
<< " ClockTime = " << runTime.elapsedClockTime() << " s"
|
|
<< nl << endl;
|
|
}
|
|
|
|
Info<< "End\n" << endl;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|