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foam-extend4.1-coherent-io/applications/solvers/incompressible/icoFoam/icoFoam.C
Vuko Vukcevic ed03625c8b Changes to solutionControl time consistency functions
I realised that we need separate treatment for transient and steady state
solvers (which do not have ddt equation). Hence, I provided necessary interface
and implementation for steady state solvers.
2017-01-04 13:48:17 +01:00

138 lines
4 KiB
C

/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | foam-extend: Open Source CFD
\\ / O peration | Version: 4.0
\\ / A nd | Web: http://www.foam-extend.org
\\/ M anipulation | For copyright notice see file Copyright
-------------------------------------------------------------------------------
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
icoFoam
Description
Transient solver for incompressible, laminar flow of Newtonian fluids.
Consistent formulation without time-step and relaxation dependence by
Jasak and Tukovic.
Author
Hrvoje Jasak, Wikki Ltd. All rights reserved
\*---------------------------------------------------------------------------*/
#include "fvCFD.H"
#include "pisoControl.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
int main(int argc, char *argv[])
{
# include "setRootCase.H"
# include "createTime.H"
# include "createMesh.H"
pisoControl piso(mesh);
# include "createFields.H"
# include "initContinuityErrs.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Info<< "\nStarting time loop\n" << endl;
while (runTime.loop())
{
Info<< "Time = " << runTime.timeName() << nl << endl;
# include "CourantNo.H"
// Time-derivative matrix
fvVectorMatrix ddtUEqn(fvm::ddt(U));
// Convection-diffusion matrix
fvVectorMatrix HUEqn
(
fvm::div(phi, U)
- fvm::laplacian(nu, U)
);
if (piso.momentumPredictor())
{
solve(ddtUEqn + HUEqn == -fvc::grad(p));
}
// Prepare clean 1/a_p without time derivative contribution
volScalarField rAU = 1.0/HUEqn.A();
// --- PISO loop
while (piso.correct())
{
// Calculate U from convection-diffusion matrix
U = rAU*HUEqn.H();
// Consistently calculate flux
piso.calcTransientConsistentFlux(phi, U, rAU, ddtUEqn);
adjustPhi(phi, U, p);
while (piso.correctNonOrthogonal())
{
fvScalarMatrix pEqn
(
fvm::laplacian
(
fvc::interpolate(rAU)/piso.aCoeff(),
p,
"laplacian(rAU," + p.name() + ')'
)
==
fvc::div(phi)
);
pEqn.setReference(pRefCell, pRefValue);
pEqn.solve
(
mesh.solutionDict().solver(p.select(piso.finalInnerIter()))
);
if (piso.finalNonOrthogonalIter())
{
phi -= pEqn.flux();
}
}
# include "continuityErrs.H"
// Consistently reconstruct velocity after pressure equation
piso.reconstructTransientVelocity(U, ddtUEqn, rAU, p, phi);
}
runTime.write();
Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
<< " ClockTime = " << runTime.elapsedClockTime() << " s"
<< nl << endl;
}
Info<< "End\n" << endl;
return 0;
}
// ************************************************************************* //