NSRDS3.H

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License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
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Class
    Foam::Function1s::NSRDS3

Description
    NSRDS function number 103

    Source:
    \verbatim
                      NSRDS - AICHE
                 Data Compilation Tables
                    of Properties of
                     Pure Compounds

        Design Institute for Physical Property Data
          American Institute of Chemical Engineers
                  345 East 47th Street
                New York, New York 10017

         National Standard Reference Data System
         American Institute of Chemical Engineers

          T.E. Daubert       -       R.P. Danner

            Department of Chemical Engineering
            The Pennsylvania State University
                University Park, PA 16802
    \endverbatim

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

#ifndef NSRDS3_H
#define NSRDS3_H

#include "Function1.H"

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

namespace Foam
{
namespace Function1s
{

/*---------------------------------------------------------------------------*\
                           Class NSRDS3 Declaration
\*---------------------------------------------------------------------------*/

class NSRDS3
:
    public FieldFunction1<scalar, NSRDS3>
{
    // Private Data

        // NSRDS function 103 coefficients
        scalar a_, b_, c_, d_;


public:

    //- Runtime type information
    TypeName("NSRDS3");


    // Constructors

        //- Construct from components
        NSRDS3
        (
            const word& name,
            const scalar a,
            const scalar b,
            const scalar c,
            const scalar d
        );

        //- Construct from name and dictionary
        NSRDS3
        (
            const word& name,
            const dictionary& dict
        );

        //- Construct and return a clone
        virtual tmp<Function1<scalar>> clone() const
        {
            return tmp<Function1<scalar>>(new NSRDS3(*this));
        }


    // Member Functions

        //- Evaluate the function and return the result
        virtual scalar value(scalar T) const
        {
            return a_ + b_*exp(-c_/pow(T, d_));
        }

        //- Integrate between two scalar values
        virtual scalar integral(const scalar x1, const scalar x2) const;

        //- Write the function coefficients
        virtual void write(Ostream& os) const;
};


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

} // End namespace Function1s
} // End namespace Foam

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

#endif

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