BirdCarreau.H

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    Copyright (C) 2018-2020 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::laminarModels::generalizedNewtonianViscosityModels::BirdCarreau
 
Description
    An incompressible Bird-Carreau non-Newtonian viscosity model.
 
    The Bird-Carreau-Yasuda form is also supported if the optional "a"
    coefficient is specified.  "a" defaults to 2 for the Bird-Carreau model.
 
    Example specification for a polymer:
    \verbatim
         viscosityModel BirdCarreau;
 
         nuInf       0;
         n           0.5;
    \endverbatim
 
SourceFiles
    BirdCarreau.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef BirdCarreau_H
#define BirdCarreau_H
 
#include "generalizedNewtonianViscosityModel.H"
#include "dimensionedScalar.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace laminarModels
{
namespace generalizedNewtonianViscosityModels
{
 
/*---------------------------------------------------------------------------*\
                           Class BirdCarreau Declaration
\*---------------------------------------------------------------------------*/
 
class BirdCarreau
:
    public generalizedNewtonianViscosityModel
{
    // Private Data
 
        dictionary BirdCarreauCoeffs_;
 
        dimensionedScalar nuInf_;
        dimensionedScalar k_;
        dimensionedScalar n_;
        dimensionedScalar a_;
 
 
public:
 
    //- Runtime type information
    TypeName("BirdCarreau");
 
 
    // Constructors
 
        //- Construct from dictionary (components)
        explicit BirdCarreau(const dictionary& viscosityProperties);
 
 
    //- Destructor
    virtual ~BirdCarreau() = default;
 
 
    // Member Functions
 
        //- Read transportProperties dictionary
        virtual bool read(const dictionary& viscosityProperties);
 
        //- Return the laminar viscosity
        virtual tmp<volScalarField> nu
        (
            const volScalarField& nu0,
            const volScalarField& strainRate
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace generalizedNewtonianViscosityModels
} // End namespace laminarModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //