NSRDS5.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::Function1s::NSRDS5
 
Description
    NSRDS function number 105
 
    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 NSRDS5_H
#define NSRDS5_H
 
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function1s
{
 
/*---------------------------------------------------------------------------*\
                           Class NSRDS5 Declaration
\*---------------------------------------------------------------------------*/
 
class NSRDS5
:
    public FieldFunction1<scalar, NSRDS5>
{
    // Private Data
 
        // NSRDS function 105 coefficients
        scalar a_, b_, c_, d_;
 
 
public:
 
    //- Runtime type information
    TypeName("NSRDS5");
 
 
    // Constructors
 
        //- Construct from components
        NSRDS5
        (
            const word& name,
            const scalar a,
            const scalar b,
            const scalar c,
            const scalar d
        );
 
        //- Construct from name and dictionary
        NSRDS5
        (
            const word& name,
            const unitSets& units,
            const dictionary& dict
        );
 
        //- Construct and return a clone
        virtual tmp<Function1<scalar>> clone() const
        {
            return tmp<Function1<scalar>>(new NSRDS5(*this));
        }
 
 
    // Member Functions
 
        //- Evaluate the function and return the result
        virtual scalar value(const scalar T) const
        {
            const scalar p = pow(1 - T/c_, d_);
            return a_/pow(b_, 1 + p);
        }
 
        //- Evaluate the derivative and return the result
        virtual scalar derivative(const scalar T) const
        {
            const scalar p = pow(1 - T/c_, d_);
            return (a_*log(b_)/c_*d_)*p/(1 - T/c_)/pow(b_, 1 + p);
        }
 
        //- 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 unitSets& units) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function1s
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //