| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / 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 | |
| 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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| 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 | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| 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 | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |