1cacdf0d89
This is an experimental feature demonstrating the potential of MULES to
create bounded solution which are 2nd-order in time AND space.
Crank-Nicolson may be selected on U and/or alpha but will only be fully
2nd-order if used on both within the PIMPLE-loop to converge the
interaction between the flux and phase-fraction. Note also that
Crank-Nicolson may not be used with sub-cycling but all the features of
semi-implicit MULES are available in particular MULESCorr and
alphaApplyPrevCorr.
Examples of ddt specification:
ddtSchemes
{
default Euler;
}
ddtSchemes
{
default CrankNicolson 0.9;
}
ddtSchemes
{
default none;
ddt(alpha) CrankNicolson 0.9;
ddt(rho,U) CrankNicolson 0.9;
}
ddtSchemes
{
default none;
ddt(alpha) Euler;
ddt(rho,U) CrankNicolson 0.9;
}
ddtSchemes
{
default none;
ddt(alpha) CrankNicolson 0.9;
ddt(rho,U) Euler;
}
In these examples a small amount of off-centering in used to stabilize
the Crank-Nicolson scheme. Also the specification for alpha1 is via the
generic phase-fraction name to ensure in multiphase solvers (when
Crank-Nicolson support is added) the scheme is identical for all phase
fractions.
This development is back-ported from OpenFOAM-dev:
f78d33b634
120 lines
3.5 KiB
C
120 lines
3.5 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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interFoam
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Description
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Solver for 2 incompressible, isothermal immiscible fluids using a VOF
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(volume of fluid) phase-fraction based interface capturing approach.
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The momentum and other fluid properties are of the "mixture" and a single
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momentum equation is solved.
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Turbulence modelling is generic, i.e. laminar, RAS or LES may be selected.
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For a two-fluid approach see twoPhaseEulerFoam.
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "CMULES.H"
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#include "EulerDdtScheme.H"
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#include "localEulerDdtScheme.H"
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#include "CrankNicolsonDdtScheme.H"
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#include "subCycle.H"
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#include "immiscibleIncompressibleTwoPhaseMixture.H"
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#include "turbulenceModel.H"
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#include "pimpleControl.H"
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#include "fvIOoptionList.H"
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#include "fixedFluxPressureFvPatchScalarField.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 "initContinuityErrs.H"
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#include "createFields.H"
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#include "readTimeControls.H"
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#include "createPrghCorrTypes.H"
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#include "correctPhi.H"
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#include "CourantNo.H"
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#include "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 "readTimeControls.H"
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#include "CourantNo.H"
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#include "alphaCourantNo.H"
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#include "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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while (pimple.loop())
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{
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#include "alphaControls.H"
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#include "alphaEqnSubCycle.H"
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mixture.correct();
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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 "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<< "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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// ************************************************************************* //
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