strainRateFunction.H

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    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::laminarModels::generalizedNewtonianViscosityModels::strainRateFunction
 
Description
    Run-time selected strain-rate function generalized Newtonian viscosity model
 
    Example linear function of strain-rate:
    \verbatim
        generalizedNewtonianModel strainRateFunction;
 
        function polynomial ((0 0.1) (1 1.3));
    \endverbatim
 
See also
    Foam::generalizedNewtonianViscosityModel
    Foam::Function1
 
SourceFiles
    strainRateFunction.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef strainRateFunction_H
#define strainRateFunction_H
 
#include "generalizedNewtonianViscosityModel.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace laminarModels
{
namespace generalizedNewtonianViscosityModels
{
 
/*---------------------------------------------------------------------------*\
                           Class strainRateFunction Declaration
\*---------------------------------------------------------------------------*/
 
class strainRateFunction
:
    public generalizedNewtonianViscosityModel
{
    // Private Data
 
        //- Coefficients dictionary
        dictionary strainRateFunctionCoeffs_;
 
        //- Strain-rate function
        autoPtr<Function1<scalar>> strainRateFunction_;
 
 
public:
 
    //- Runtime type information
    TypeName("strainRateFunction");
 
 
    // Constructors
 
        //- Construct from dictionary (components)
        explicit strainRateFunction(const dictionary& viscosityProperties);
 
 
    //- Destructor
    virtual ~strainRateFunction() = 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
 
// ************************************************************************* //