eConstThermo.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
    (at your option) any later version.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::eConstThermo
 
Description
    Internal energy based thermodynamics package using a constant heat capacity
    at constant volume.
 
    The sensible internal energy is evaluated as:
    \verbatim
        es = Cv*(T - Tref) + esRef
    \endverbatim
 
Usage
    \table
        Property     | Description
        Cv           | Constant Heat capacity at constant volume [J/kg/K]
        Tref         | Reference temperature [K] (defaults to Tstd)
        esRef        | Reference sensible internal energy [J/kg] (defaults to 0)
        hf           | Heat of formation [J/kg]
    \endtable
 
    Example specification of eConstThermo for air:
    \verbatim
    thermodynamics
    {
        Cv          724;
        hf          0;
    }
    \endverbatim
 
SourceFiles
    eConstThermoI.H
    eConstThermo.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef eConstThermo_H
#define eConstThermo_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of friend functions and operators
 
template<class EquationOfState> class eConstThermo;
 
template<class EquationOfState>
inline eConstThermo<EquationOfState> operator+
(
    const eConstThermo<EquationOfState>&,
    const eConstThermo<EquationOfState>&
);
 
template<class EquationOfState>
inline eConstThermo<EquationOfState> operator*
(
    const scalar,
    const eConstThermo<EquationOfState>&
);
 
template<class EquationOfState>
inline eConstThermo<EquationOfState> operator==
(
    const eConstThermo<EquationOfState>&,
    const eConstThermo<EquationOfState>&
);
 
template<class EquationOfState>
Ostream& operator<<
(
    Ostream&,
    const eConstThermo<EquationOfState>&
);
 
 
/*---------------------------------------------------------------------------*\
                        Class eConstThermo Declaration
\*---------------------------------------------------------------------------*/
 
template<class EquationOfState>
class eConstThermo
:
    public EquationOfState
{
    // Private Data
 
        //- Heat capacity at constant volume [J/kg/K]
        scalar Cv_;
 
        //- 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 esRef_;
 
 
public:
 
    // Constructors
 
        //- Construct from components
        inline eConstThermo
        (
            const EquationOfState& st,
            const scalar Cv,
            const scalar hf,
            const scalar Tref,
            const scalar esRef
        );
 
        //- Construct from name and dictionary
        eConstThermo(const word& name, const dictionary& dict);
 
        //- Construct as named copy
        inline eConstThermo(const word&, const eConstThermo&);
 
        //- Construct and return a clone
        inline autoPtr<eConstThermo> clone() const;
 
 
    // Member Functions
 
        //- Return the instantiated type name
        static word typeName()
        {
            return "eConst<" + 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 volume [J/kg/K]
            inline scalar Cv(const scalar p, const scalar T) const;
 
            //- Sensible internal energy [J/kg]
            inline scalar es(const scalar p, const scalar T) const;
 
            //- Absolute internal energy [J/kg]
            inline scalar ea(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 "EtoHthermo.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 eConstThermo&);
 
 
    // Friend operators
 
        friend eConstThermo operator+ <EquationOfState>
        (
            const eConstThermo&,
            const eConstThermo&
        );
 
        friend eConstThermo operator* <EquationOfState>
        (
            const scalar,
            const eConstThermo&
        );
 
        friend eConstThermo operator== <EquationOfState>
        (
            const eConstThermo&,
            const eConstThermo&
        );
 
 
    // IOstream Operators
 
        friend Ostream& operator<< <EquationOfState>
        (
            Ostream&,
            const eConstThermo&
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "eConstThermoI.H"
 
#ifdef NoRepository
    #include "eConstThermo.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //