0ed84ff137
Currently in compressibleVoF vDot contains only the compressibility dilatation
effect whereas in multiphaseEuler the effect of sources are also included but
this will be refactored shortly so that the handling of mass sources and
compressibility is consistent between VoF and Euler-Euler solvers.
The previously hard-coded 1e-4 division stabilisation used when linearising vDot
for bounded semi-implicit solution of the phase-fractions is now an optional
user-input with keyword vDotResidualAlpha, e.g. in multiphaseEuler:
solvers
{
"alpha.*"
{
nAlphaCorr 1;
nAlphaSubCycles 2;
vDotResidualAlpha 1e-6;
}
.
.
.
192 lines
5.4 KiB
C++
192 lines
5.4 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2023 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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Class
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Foam::solvers::twoPhaseSolver
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Description
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Solver module base-class for 2 immiscible fluids, with optional
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mesh motion and mesh topology changes including adaptive re-meshing.
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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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Either mixture or two-phase transport modelling may be selected. In the
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mixture approach a single laminar, RAS or LES model is selected to model the
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momentum stress. In the Euler-Euler two-phase approach separate laminar,
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RAS or LES selected models are selected for each of the phases.
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Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
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pseudo-transient and steady simulations.
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Optional fvModels and fvConstraints are provided to enhance the simulation
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in many ways including adding various sources, Lagrangian
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particles, surface film etc. and constraining or limiting the solution.
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SourceFiles
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twoPhaseSolver.C
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See also
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Foam::solvers::fluidSolver
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\*---------------------------------------------------------------------------*/
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#ifndef twoPhaseSolver_H
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#define twoPhaseSolver_H
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#include "VoFSolver.H"
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#include "twoPhaseVoFMixture.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace solvers
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{
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/*---------------------------------------------------------------------------*\
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Class twoPhaseSolver Declaration
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\*---------------------------------------------------------------------------*/
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class twoPhaseSolver
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:
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public VoFSolver
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{
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protected:
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// Phase properties
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//- Reference to the twoPhaseVoFMixture
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twoPhaseVoFMixture& mixture;
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//- Reference to the phase1-fraction
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volScalarField& alpha1;
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//- Reference to the phase2-fraction
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volScalarField& alpha2;
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//- Switch indicating if this is a restart
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bool alphaRestart;
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// Kinematic properties
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// Phase-1 volumetric flux
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surfaceScalarField alphaPhi1;
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// Cached temporary fields
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//- MULES Correction
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tmp<surfaceScalarField> talphaPhi1Corr0;
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private:
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// Private Member Functions
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//- Solve for the phase-fractions
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void alphaSolve(const dictionary& alphaControls);
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protected:
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// Protected Member Functions
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virtual tmp<surfaceScalarField> alphaPhi
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(
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const surfaceScalarField& phi,
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const volScalarField& alpha,
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const dictionary& alphaControls
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);
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//- Solve for the phase-fractions
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void alphaPredictor();
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//- Calculate the alpha equation sources
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virtual void alphaSuSp
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(
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tmp<volScalarField::Internal>& Su,
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tmp<volScalarField::Internal>& Sp,
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const dictionary& alphaControls
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) = 0;
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//- Correct the interface properties following mesh-change
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// and phase-fraction update
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virtual void correctInterface() = 0;
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//- Return the interface surface tension force for the momentum equation
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virtual tmp<surfaceScalarField> surfaceTensionForce() const = 0;
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//- Construct and solve the incompressible pressure equation
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// in the PISO loop
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void incompressiblePressureCorrector(volScalarField& p);
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public:
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//- Runtime type information
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TypeName("twoPhaseSolver");
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// Constructors
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//- Construct from region mesh
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twoPhaseSolver(fvMesh& mesh, autoPtr<twoPhaseVoFMixture>);
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//- Disallow default bitwise copy construction
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twoPhaseSolver(const twoPhaseSolver&) = delete;
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//- Destructor
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virtual ~twoPhaseSolver();
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// Member Functions
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//- Called at the start of the time-step, before the PIMPLE loop
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virtual void preSolve();
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//- Called at the start of the PIMPLE loop
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virtual void prePredictor();
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// Member Operators
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//- Disallow default bitwise assignment
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void operator=(const twoPhaseSolver&) = delete;
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace solvers
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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