hConstThermo.H

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Class
    Foam::hConstThermo

Description
    Enthalpy based thermodynamics package using a constant heat capacity
    at constant pressure:

    \verbatim
        h = Cp*(T - Tref) + Hsref
    \endverbatim

Usage
    \table
        Property     | Description
        Cp           | Constant Heat capacity at constant pressure [J/kg/K]
        Tref         | Reference temperature [K] (defaults to Tstd)
        Hsref        | Reference sensible enthalpy [J/kg] (defaults to 0)
        Hf           | Heat of formation [J/kg]
    \endtable

    Example specification of hConstThermo for air:
    \verbatim
    thermodynamics
    {
        Cp          1007;
        Hf          0;
    }
    \endverbatim

SourceFiles
    hConstThermoI.H
    hConstThermo.C

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

#ifndef hConstThermo_H
#define hConstThermo_H

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

namespace Foam
{

// Forward declaration of friend functions and operators

template<class EquationOfState> class hConstThermo;

template<class EquationOfState>
inline hConstThermo<EquationOfState> operator+
(
    const hConstThermo<EquationOfState>&,
    const hConstThermo<EquationOfState>&
);

template<class EquationOfState>
inline hConstThermo<EquationOfState> operator*
(
    const scalar,
    const hConstThermo<EquationOfState>&
);

template<class EquationOfState>
inline hConstThermo<EquationOfState> operator==
(
    const hConstThermo<EquationOfState>&,
    const hConstThermo<EquationOfState>&
);

template<class EquationOfState>
Ostream& operator<<
(
    Ostream&,
    const hConstThermo<EquationOfState>&
);


/*---------------------------------------------------------------------------*\
                        Class hConstThermo Declaration
\*---------------------------------------------------------------------------*/

template<class EquationOfState>
class hConstThermo
:
    public EquationOfState
{
    // Private Data

        //- Heat capacity at constant pressure [J/kg/K]
        scalar Cp_;

        //- Heat of formation [J/kg]
        scalar Hf_;

        //- Reference temperature around which to linearise [K]
        scalar Tref_;

        //- Reference sensible enthalpy around which to linearise [J/kg]
        scalar Hsref_;


    // Private Member Functions

        //- Construct from components
        inline hConstThermo
        (
            const EquationOfState& st,
            const scalar Cp,
            const scalar Hf,
            const scalar Tref,
            const scalar Hsref
        );


public:

    // Constructors

        //- Construct from dictionary
        hConstThermo(const dictionary& dict);

        //- Construct as named copy
        inline hConstThermo(const word&, const hConstThermo&);

        //- Construct and return a clone
        inline autoPtr<hConstThermo> clone() const;

        //- Selector from dictionary
        inline static autoPtr<hConstThermo> New(const dictionary& dict);


    // Member Functions

        //- Return the instantiated type name
        static word typeName()
        {
            return "hConst<" + EquationOfState::typeName() + '>';
        }

        //- Limit the temperature to be in the range Tlow_ to Thigh_
        inline scalar limit(const scalar T) const;


        // Fundamental properties

            //- Heat capacity at constant pressure [J/kg/K]
            inline scalar Cp(const scalar p, const scalar T) const;

            //- Absolute enthalpy [J/kg]
            inline scalar Ha(const scalar p, const scalar T) const;

            //- Sensible enthalpy [J/kg]
            inline scalar Hs(const scalar p, const scalar T) const;

            //- Enthalpy of formation [J/kg]
            inline scalar Hf() const;

            //- Entropy [J/kg/K]
            inline scalar S(const scalar p, const scalar T) const;

            //- Gibbs free energy of the mixture in the standard state [J/kg]
            inline scalar Gstd(const scalar T) const;

            #include "HtoEthermo.H"


        // Derivative term used for Jacobian

            //- Temperature derivative of heat capacity at constant pressure
            inline scalar dCpdT(const scalar p, const scalar T) const;


        // I-O

            //- Write to Ostream
            void write(Ostream& os) const;


    // Member Operators

        inline void operator+=(const hConstThermo&);


    // Friend operators

        friend hConstThermo operator+ <EquationOfState>
        (
            const hConstThermo&,
            const hConstThermo&
        );

        friend hConstThermo operator* <EquationOfState>
        (
            const scalar,
            const hConstThermo&
        );

        friend hConstThermo operator== <EquationOfState>
        (
            const hConstThermo&,
            const hConstThermo&
        );


    // IOstream Operators

        friend Ostream& operator<< <EquationOfState>
        (
            Ostream&,
            const hConstThermo&
        );
};


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

} // End namespace Foam

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

#include "hConstThermoI.H"

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

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

#endif

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