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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2023-2026 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM 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.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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for more details.
You should have received a copy of the GNU General Public License
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Class
Foam::solvers::twoPhaseSolver
Description
Solver module base-class for 2 immiscible fluids, with optional
mesh motion and mesh topology changes including adaptive re-meshing.
The momentum and other fluid properties are of the "mixture" and a single
momentum equation is solved.
Either mixture or two-phase transport modelling may be selected. In the
mixture approach a single laminar, RAS or LES model is selected to model the
momentum stress. In the Euler-Euler two-phase approach separate laminar,
RAS or LES selected models are selected for each of the phases.
Uses the flexible PIMPLE (PISO-SIMPLE) solution for time-resolved and
pseudo-transient and steady simulations.
Optional fvModels and fvConstraints are provided to enhance the simulation
in many ways including adding various sources, Lagrangian
particles, surface film etc. and constraining or limiting the solution.
SourceFiles
twoPhaseSolver.C
See also
Foam::solvers::basicFluidSolver
\*---------------------------------------------------------------------------*/
#ifndef twoPhaseSolver_H
#define twoPhaseSolver_H
#include "VoFSolver.H"
#include "twoPhaseVoFMixture.H"
#include "MULES.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace solvers
{
/*---------------------------------------------------------------------------*\
Class twoPhaseSolver Declaration
\*---------------------------------------------------------------------------*/
class twoPhaseSolver
:
public VoFSolver
{
protected:
// Phase properties
//- Reference to the twoPhaseVoFMixture
twoPhaseVoFMixture& mixture;
//- Reference to the phase1-fraction
volScalarField& alpha1;
//- Reference to the phase2-fraction
volScalarField& alpha2;
//- Switch indicating if this is a restart
bool alphaRestart;
//- Function to calculate the number of explicit MULES sub-cycles
// from the alpha Courant number
autoPtr<Function1<scalar>> nAlphaSubCyclesPtr;
//- Number of alpha correctors
// Usually used to improve the accuracy at high Courant numbers
// with semi-implicit MULES, MULESCorr = true
label nAlphaCorr;
//- Semi-implicit MULES switch
bool MULESCorr;
//- Apply the compression correction from the previous iteration
// Improves efficiency for steady-simulations but can only be applied
// once the alpha field is reasonably steady, i.e. fully developed
bool alphaApplyPrevCorr;
//- MULES controls
MULES::control MULEScontrols;
// Kinematic properties
// Phase-1 volumetric flux
surfaceScalarField alphaPhi1;
// Phase-2 volumetric flux
surfaceScalarField alphaPhi2;
// Cached temporary fields
//- MULES Correction
tmp<surfaceScalarField> talphaPhi1Corr0;
private:
// Private Member Functions
//- Solve for the phase-fractions
void alphaSolve(const label nAlphaSubCycles);
protected:
// Protected Member Functions
//- Read controls
virtual bool read();
virtual tmp<surfaceScalarField> alphaPhi
(
const surfaceScalarField& phi,
const volScalarField& alpha
);
//- Solve for the phase-fractions
void alphaPredictor();
//- Calculate the alpha equation sources
virtual void alphaSuSp
(
tmp<volInternalScalarField>& Su,
tmp<volInternalScalarField>& Sp
) = 0;
//- Correct the interface properties following mesh-change
// and phase-fraction update
virtual void correctInterface() = 0;
//- Return the interface surface tension force for the momentum equation
virtual tmp<surfaceScalarField> surfaceTensionForce() const = 0;
//- Construct and solve the incompressible pressure equation
// in the PISO loop
void incompressiblePressureCorrector(volScalarField& p);
public:
//- Runtime type information
TypeName("twoPhaseSolver");
// Constructors
//- Construct from region mesh
twoPhaseSolver(fvMesh& mesh, autoPtr<twoPhaseVoFMixture>);
//- Disallow default bitwise copy construction
twoPhaseSolver(const twoPhaseSolver&) = delete;
//- Destructor
virtual ~twoPhaseSolver();
// Member Functions
//- Called at the start of the time-step, before the PIMPLE loop
virtual void preSolve();
//- Called at the start of the PIMPLE loop
virtual void prePredictor();
// Member Operators
//- Disallow default bitwise assignment
void operator=(const twoPhaseSolver&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace solvers
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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