qInterfaceProperties.H

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    Copyright (C) 2019 OpenCFD Ltd.
    Copyright (C) 2016-2019 ISP RAS (www.ispras.ru) UniCFD Group (www.unicfd.ru)
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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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Class
    Foam::qInterfaceProperties

Group
    grpQInterfaceProperties

Description
    Contains the interface properties.

    Properties to aid interFoam:
    -# Correct the alpha boundary condition for dynamic contact angle.
    -# Calculate interface curvature.

SourceFiles
    qInterfaceProperties.C

\*---------------------------------------------------------------------------*/

#ifndef qInterfaceProperties_H
#define qInterfaceProperties_H

#include "IOdictionary.H"
#include "surfaceTensionModel.H"
#include "volFields.H"
#include "surfaceFields.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                     Class qInterfaceProperties Declaration
\*---------------------------------------------------------------------------*/

class qInterfaceProperties
{
    // Private data

        //- Keep a reference to the transportProperties dictionary
        const dictionary& transportPropertiesDict_;

        //- Compression coefficient
        scalar cAlpha_;

        //- Surface tension
        autoPtr<surfaceTensionModel> sigmaPtr_;

        //- Stabilisation for normalisation of the interface normal
        const dimensionedScalar deltaN_;

        const volScalarField& alpha1_;
        const volVectorField& U_;
        surfaceScalarField nHatf_;
        volScalarField K_;


    // Private Member Functions

        //- No copy construct
        qInterfaceProperties(const qInterfaceProperties&) = delete;

        //- No copy assignment
        void operator=(const qInterfaceProperties&) = delete;

        //- Correction for the boundary condition on the unit normal nHat on
        //  walls to produce the correct contact dynamic angle
        //  calculated from the component of U parallel to the wall
        void correctContactAngle
        (
            surfaceVectorField::Boundary& nHat,
            const surfaceVectorField::Boundary& gradAlphaf
        ) const;

        //- Re-calculate the interface curvature
        void calculateK();


public:

    // Constructors

        //- Construct from volume fraction field gamma and IOdictionary
        qInterfaceProperties
        (
            const volScalarField& alpha1,
            const volVectorField& U,
            const IOdictionary&
        );


    // Member Functions

        scalar cAlpha() const
        {
            return cAlpha_;
        }

        const dimensionedScalar& deltaN() const
        {
            return deltaN_;
        }

        const surfaceScalarField& nHatf() const
        {
            return nHatf_;
        }

        tmp<volScalarField> sigmaK() const;

        tmp<surfaceScalarField> surfaceTensionForce() const;

        //- Indicator of the proximity of the interface
        //  Field values are 1 near and 0 away for the interface.
        tmp<volScalarField> nearInterface() const;

        void correct();

        //- Read transportProperties dictionary
        bool read();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //