/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
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    Copyright (C) 2011-2018 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
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Class
    Foam::kineticTheoryModels::frictionalStressModels::JohnsonJackson

Description

SourceFiles
    JohnsonJacksonFrictionalStress.C

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

#ifndef JohnsonJacksonFrictionalStress_H
#define JohnsonJacksonFrictionalStress_H

#include "frictionalStressModel.H"

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

namespace Foam
{
namespace kineticTheoryModels
{
namespace frictionalStressModels
{

/*---------------------------------------------------------------------------*\
               Class JohnsonJackson Declaration
\*---------------------------------------------------------------------------*/

class JohnsonJackson
:
    public frictionalStressModel
{
    // Private data

        dictionary coeffDict_;

        //- Material constant for frictional normal stress
        dimensionedScalar Fr_;

        //- Material constant for frictional normal stress
        dimensionedScalar eta_;

        //- Material constant for frictional normal stress
        dimensionedScalar p_;

        //- Angle of internal friction
        dimensionedScalar phi_;

        //- Lower limit for (alphaMax - alpha1)
        dimensionedScalar alphaDeltaMin_;


public:

    //- Runtime type information
    TypeName("JohnsonJackson");


    // Constructors

        //- Construct from components
        JohnsonJackson(const dictionary& dict);


    //- Destructor
    virtual ~JohnsonJackson();


    // Member functions

        virtual tmp<volScalarField> frictionalPressure
        (
            const phaseModel& phase,
            const dimensionedScalar& alphaMinFriction,
            const dimensionedScalar& alphaMax
        ) const;

        virtual tmp<volScalarField> frictionalPressurePrime
        (
            const phaseModel& phase,
            const dimensionedScalar& alphaMinFriction,
            const dimensionedScalar& alphaMax
        ) const;

        virtual tmp<volScalarField> nu
        (
            const phaseModel& phase,
            const dimensionedScalar& alphaMinFriction,
            const dimensionedScalar& alphaMax,
            const volScalarField& pf,
            const volSymmTensorField& D
        ) const;

        virtual bool read();
};


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

} // End namespace frictionalStressModels
} // End namespace kineticTheoryModels
} // End namespace Foam

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

#endif

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