multiphaseSystem.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2013-2018 OpenFOAM Foundation
-------------------------------------------------------------------------------
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.
 
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    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::multiphaseSystem
 
Description
    Class which solves the volume fraction equations for two phases.
 
SourceFiles
    multiphaseSystem.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef multiphaseSystem_H
#define multiphaseSystem_H
 
#include "phaseSystem.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class dragModel;
class virtualMassModel;
 
/*---------------------------------------------------------------------------*\
                         Class multiphaseSystem Declaration
\*---------------------------------------------------------------------------*/
 
class multiphaseSystem
:
    public phaseSystem
{
    // Private Typedefs
 
        typedef HashTable<scalar, phasePairKey, phasePairKey::hash>
            cAlphaTable;
 
 
    // Private Data
 
        //- The indexed phase-fraction field;
        //  E.g., 1 for water, 2 for air, 3 for oil, etc...
        volScalarField alphas_;
 
        //-
        cAlphaTable cAlphas_;
 
        //- Stabilisation for normalisation of the interface normal
        const dimensionedScalar deltaN_;
 
 
    // Private Member Functions
 
        void calcAlphas();
 
        void solveAlphas();
 
        tmp<surfaceVectorField> nHatfv
        (
            const volScalarField& alpha1,
            const volScalarField& alpha2
        ) const;
 
        tmp<surfaceScalarField> nHatf
        (
            const volScalarField& alpha1,
            const volScalarField& alpha2
        ) const;
 
        void correctContactAngle
        (
            const phaseModel& alpha1,
            const phaseModel& alpha2,
            surfaceVectorField::Boundary& nHatb
        ) const;
 
        tmp<volScalarField> K
        (
            const phaseModel& alpha1,
            const phaseModel& alpha2
        ) const;
 
        //- Return the drag coefficient for phase pair
        virtual tmp<volScalarField> Kd(const phasePairKey& key) const = 0;
 
        //- Return the virtual mass coefficient for phase pair
        virtual tmp<volScalarField> Vm(const phasePairKey& key) const = 0;
 
 
protected:
 
    // Protected data
 
        //- Flag to indicate that returned lists of fields are "complete"; i.e.,
        //  that an absence of force is returned as a constructed list of zeros,
        //  rather than a null pointer
        static const bool fillFields_ = false;
 
 
public:
 
    //- Runtime type information
    TypeName("multiphaseSystem");
 
    // Declare runtime construction
 
        declareRunTimeSelectionTable
        (
            autoPtr,
            multiphaseSystem,
            dictionary,
            (
                const fvMesh& mesh
            ),
            (mesh)
        );
 
 
    // Constructors
 
        //- Construct from fvMesh
        explicit multiphaseSystem(const fvMesh& mesh);
 
 
    //- Destructor
    virtual ~multiphaseSystem() = default;
 
 
    // Selectors
 
        static autoPtr<multiphaseSystem> New
        (
            const fvMesh& mesh
        );
 
 
    // Member Functions
 
        using phaseSystem::sigma;
        using phaseSystem::dmdts;
 
        //- Return the surface tension force
        tmp<surfaceScalarField> surfaceTension(const phaseModel& phase) const;
 
        //- Indicator of the proximity of the interface
        //  Field values are 1 near and 0 away for the interface.
        tmp<volScalarField> nearInterface() const;
 
        //- Solve for the phase fractions
        virtual void solve();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //