PTT.H

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    This file is part of OpenFOAM.

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Class
    Foam::laminarModels::PTT

Description
    PTT model for viscoelasticity using the upper-convected time
    derivative of the stress tensor with support for multiple modes.

    Reference:
    \verbatim
        Phan-Thien, N., & Tanner, R. I. (1977).
        A new constitutive equation derived from network theory.
        Journal of Non-Newtonian Fluid Mechanics, 2(4), 353-365.
    \endverbatim

See also
    Foam::laminarModels::Maxwell
    Foam::laminarModels::Giesekus

SourceFiles
    PTT.C

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

#ifndef PTT_H
#define PTT_H

#include "Maxwell.H"

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

namespace Foam
{
namespace laminarModels
{

/*---------------------------------------------------------------------------*\
                             Class PTT Declaration
\*---------------------------------------------------------------------------*/

template<class BasicMomentumTransportModel>
class PTT
:
    public Maxwell<BasicMomentumTransportModel>
{
protected:

    // Protected data

        // Mode coefficients

            PtrList<dimensionedScalar> epsilons_;


    // Protected Member Functions

        virtual tmp<fvSymmTensorMatrix> sigmaSource
        (
            const label modei,
            volSymmTensorField& sigma
        ) const;


public:

    typedef typename BasicMomentumTransportModel::alphaField alphaField;
    typedef typename BasicMomentumTransportModel::rhoField rhoField;


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


    // Constructors

        //- Construct from components
        PTT
        (
            const alphaField& alpha,
            const rhoField& rho,
            const volVectorField& U,
            const surfaceScalarField& alphaRhoPhi,
            const surfaceScalarField& phi,
            const viscosity& viscosity,
            const word& type = typeName
        );

        //- Disallow default bitwise copy construction
        PTT(const PTT&) = delete;



    //- Destructor
    virtual ~PTT()
    {}


    // Member Functions

        //- Re-read model coefficients if they have changed
        virtual bool read();


    // Member Operators

        //- Disallow default bitwise assignment
        void operator=(const PTT&) = delete;
};


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

} // End namespace laminarModels
} // End namespace Foam

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

#ifdef NoRepository
    #include "PTT.C"
#endif

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

#endif

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