06893a0bc6
Much of the VoF functionality, particularly relating to momentum solution, is independent of the number of phases and it is useful to hold this generic VoF data and functionality in an abstract base-class and derive twoPhaseVoFSolver and multiphaseVoFSolver from it, adding two-phase and multiphase functionality respectively.
234 lines
6.5 KiB
C++
234 lines
6.5 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2022-2023 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::compressibleVoF
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Description
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Solver module for for 2 compressible, non-isothermal immiscible fluids
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using a VOF (volume of fluid) phase-fraction based interface capturing
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approach, with optional mesh motion and mesh topology changes including
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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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compressibleVoF.C
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See also
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Foam::solvers::VoFSolver
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Foam::solvers::twoPhaseVoFSolver
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Foam::solvers::incompressibleVoF
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\*---------------------------------------------------------------------------*/
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#ifndef compressibleVoF_H
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#define compressibleVoF_H
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#include "twoPhaseVoFSolver.H"
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#include "compressibleTwoPhaseMixture.H"
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#include "compressibleInterPhaseTransportModel.H"
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#include "compressibleInterPhaseThermophysicalTransportModel.H"
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#include "buoyancy.H"
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#include "pressureReference.H"
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#include "fvmSup.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 compressibleVoF Declaration
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\*---------------------------------------------------------------------------*/
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class compressibleVoF
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:
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public twoPhaseVoFSolver
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{
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protected:
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// Phase properties
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//- The compressible two-phase mixture
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compressibleTwoPhaseMixture& mixture;
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// Thermophysical properties
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//- Reference to the mixture static pressure field
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volScalarField& p;
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//- Compressibility source
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volScalarField::Internal dgdt;
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// Pressure reference
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//- Pressure reference
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Foam::pressureReference pressureReference_;
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//- Minimum pressure
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dimensionedScalar pMin;
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// Kinematic properties
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// Phase-1 mass-flux
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surfaceScalarField alphaRhoPhi1;
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// Phase-2 mass-flux
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surfaceScalarField alphaRhoPhi2;
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//- Kinetic energy field
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// Used in the energy equation
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volScalarField K;
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// Momentum transport
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//- Momentum transport model
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compressibleInterPhaseTransportModel momentumTransport;
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// Thermophysical transport
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//- Thermophysical transport model
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compressibleInterPhaseThermophysicalTransportModel
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thermophysicalTransport;
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// Cached temporary fields
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//- Phase-1 continuity error
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tmp<volScalarField::Internal> contErr1;
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//- Phase-2 continuity error
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tmp<volScalarField::Internal> contErr2;
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protected:
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// Protected Member Functions
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//- Return the pressure reference
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virtual const Foam::pressureReference& pressureReference() const
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{
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return pressureReference_;
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}
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//- Compressible flow is divergent
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virtual bool divergent()
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{
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return true;
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}
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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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);
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//- Return the momentum equation stress term
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virtual tmp<fvVectorMatrix> divDevTau(volVectorField& U)
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{
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return
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momentumTransport.divDevTau(U)
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- fvm::Sp(contErr1() + contErr2(), U);
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}
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public:
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//- Runtime type information
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TypeName("compressibleVoF");
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// Constructors
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//- Construct from region mesh
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compressibleVoF(fvMesh& mesh);
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//- Disallow default bitwise copy construction
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compressibleVoF(const compressibleVoF&) = delete;
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//- Destructor
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virtual ~compressibleVoF();
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// Member Functions
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//- Called at the start of the PIMPLE loop
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virtual void prePredictor();
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//- Construct and optionally solve the momentum equation
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virtual void momentumPredictor();
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//- Construct and solve the energy equation,
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// convert to temperature
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// and update thermophysical and transport properties
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virtual void thermophysicalPredictor();
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//- Construct and solve the pressure equation in the PISO loop
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virtual void pressureCorrector();
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//- Correct the momentum and thermophysical transport modelling
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virtual void postCorrector();
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// Member Operators
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//- Disallow default bitwise assignment
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void operator=(const compressibleVoF&) = 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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