| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2022-2026 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::multiphaseEuler | |
| Description | |
| Solver module for a system of any number of compressible fluid phases with a | |
| common pressure, but otherwise separate properties. The type of phase model | |
| is run time selectable and can optionally represent multiple species and | |
| in-phase reactions. The phase system is also run time selectable and can | |
| optionally represent different types of momentum, heat and mass transfer. | |
| 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 | |
| multiphaseEuler.C | |
| See also | |
| Foam::solvers::compressibleVoF | |
| Foam::solvers::basicFluidSolver | |
| Foam::solvers::incompressibleFluid | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| namespace solvers | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class multiphaseEuler Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class multiphaseEuler | |
| : | |
| public basicFluidSolver | |
| { | |
| protected: | |
| // Controls | |
| //- Momentum equation predictor switch | |
| // Defaults to false | |
| Switch predictMomentum; | |
| //- Cell/face momentum equation switch | |
| // Defaults to false, i.e. uses the cell momentum equation | |
| Switch faceMomentum; | |
| //- Cell/face drag correction for cell momentum corrector | |
| // Defaults to false | |
| Switch dragCorrection; | |
| //- Number of energy correctors | |
| // Used to improve stability of phase-change simulations | |
| // Defaults to 1 | |
| int nEnergyCorrectors; | |
| phaseSystem::alphaControl alphaControls; | |
| //- Optional LTS reciprocal time-step field | |
| tmp<volScalarField> trDeltaT; | |
| //- Optional LTS reciprocal face time-step field | |
| tmp<surfaceScalarField> trDeltaTf; | |
| //- Buoyancy force | |
| solvers::buoyancy buoyancy; | |
| // Phase properties | |
| phaseSystem fluid_; | |
| phaseSystem::phaseModelList& phases_; | |
| phaseSystem::phaseModelPartialList& movingPhases_; | |
| surfaceScalarField& phi_; | |
| momentumTransferSystem momentumTransferSystem_; | |
| heatTransferSystem heatTransferSystem_; | |
| populationBalanceSystem populationBalanceSystem_; | |
| // Thermophysical properties | |
| volScalarField& p_; | |
| //- Reference to the buoyant pressure for buoyant cases | |
| // otherwise to the pressure | |
| volScalarField& p_rgh_; | |
| // Pressure reference | |
| //- Pressure reference | |
| Foam::pressureReference pressureReference; | |
| // Optional models | |
| const MRFZones& MRF; | |
| // Cached temporary fields | |
| //- Temporary phase momentum matrices | |
| // shared between the momentum predictor and pressure corrector | |
| PtrList<fvVectorMatrix> UEqns; | |
| //- Temporary storage for the reciprocal momentum equation diagonal | |
| // Used by the phase-fraction predictor and pressure corrector | |
| PtrList<volScalarField> rAs; | |
| //- Stored divU from the previous mesh so that it can be | |
| // mapped and used in correctPhi to ensure the corrected phi | |
| // has the same divergence | |
| autoPtr<volInternalScalarField> divU; | |
| //- Read controls | |
| virtual bool read(); | |
| private: | |
| // Private Member Functions | |
| //- Set rDeltaT for LTS | |
| virtual void setRDeltaT(); | |
| //- Correct the cached Courant numbers | |
| void correctCoNum(); | |
| //- Composition predictor | |
| // called in prePredictor() after phase-fraction prediction | |
| void compositionPredictor(); | |
| //- Energy and temperature predictor | |
| void energyPredictor(); | |
| //- Cell-based momentum equation predictor | |
| void cellMomentumPredictor(); | |
| //- Face-based momentum equation predictor | |
| void faceMomentumPredictor(); | |
| //- Cell-based pressure equation predictor | |
| void cellPressureCorrector(); | |
| //- Face-based pressure equation predictor | |
| void facePressureCorrector(); | |
| //- Return the list of pressure equation compressibility contributions | |
| PtrList<fvScalarMatrix> compressibilityEqns | |
| ( | |
| const PtrList<volInternalScalarField>& dmdts | |
| ) const; | |
| public: | |
| // Public Data | |
| //- Reference to the multiphase fluid | |
| const phaseSystem& fluid; | |
| //- Reference to the phases | |
| const phaseSystem::phaseModelList& phases; | |
| //- Reference to the moving phases | |
| const phaseSystem::phaseModelPartialList& movingPhases; | |
| //- Reference to the momentum transfer system | |
| const momentumTransferSystem& momentumTransfer; | |
| //- Reference to the heat transfer system | |
| const heatTransferSystem& heatTransfer; | |
| //- Reference to the pressure field | |
| const volScalarField& p; | |
| //- Reference to the buoyant pressure for buoyant cases | |
| // otherwise to the pressure | |
| const volScalarField& p_rgh; | |
| //- Reference to the mass-flux field | |
| const surfaceScalarField& phi; | |
| //- Runtime type information | |
| TypeName("multiphaseEuler"); | |
| // Constructors | |
| //- Construct from region mesh | |
| multiphaseEuler(fvMesh& mesh); | |
| //- Disallow default bitwise copy construction | |
| multiphaseEuler(const multiphaseEuler&) = delete; | |
| //- Destructor | |
| virtual ~multiphaseEuler(); | |
| // 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 to move the mesh | |
| virtual void moveMesh(); | |
| //- Corrections that follow mesh motion | |
| virtual void motionCorrector(); | |
| //- Called at the start of the PIMPLE loop | |
| virtual void prePredictor(); | |
| //- Predict the momentum transport | |
| virtual void momentumTransportPredictor(); | |
| //- Predict thermophysical transport | |
| virtual void thermophysicalTransportPredictor(); | |
| //- Construct and optionally solve the momentum equation | |
| virtual void momentumPredictor(); | |
| //- Construct and solve the energy equation, | |
| // convert to temperature | |
| // and update thermophysical and transport properties | |
| virtual void thermophysicalPredictor(); | |
| //- Construct and solve the pressure equation in the PISO loop | |
| virtual void pressureCorrector(); | |
| //- Correct the momentum transport | |
| virtual void momentumTransportCorrector(); | |
| //- Correct the thermophysical transport | |
| virtual void thermophysicalTransportCorrector(); | |
| //- Called after the PIMPLE loop at the end of the time-step | |
| virtual void postSolve(); | |
| // Member Operators | |
| //- Disallow default bitwise assignment | |
| void operator=(const multiphaseEuler&) = delete; | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace solvers | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |