ePowerThermo.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.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    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::ePowerThermo
 
Description
    Internal energy based thermodynamics package using a power function of
    temperature for the constant heat capacity at constant volume which is
    particularly suitable for solids at low temperatures:
 
    \verbatim
        Cv = c0*pow(T/Tref, n0)
    \endverbatim
 
Usage
    \table
        Property     | Description
        c0           | Reference heat capacity at constant volume [J/kg/K]
        n0           | Exponent of the power function
        Tref         | Reference temperature [K]
        Hf           | Heat of formation [J/kg]
    \endtable
 
    Example specification of ePowerThermo:
    \verbatim
    thermodynamics
    {
        c0          230;
        Tref        470;
        n0          3;
        Hf          0;
    }
    \endverbatim
 
SourceFiles
    ePowerThermoI.H
    ePowerThermo.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef ePowerThermo_H
#define ePowerThermo_H
 
#include "scalar.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of friend functions and operators
 
template<class EquationOfState> class ePowerThermo;
 
template<class EquationOfState>
inline ePowerThermo<EquationOfState> operator+
(
    const ePowerThermo<EquationOfState>&,
    const ePowerThermo<EquationOfState>&
);
 
template<class EquationOfState>
inline ePowerThermo<EquationOfState> operator*
(
    const scalar,
    const ePowerThermo<EquationOfState>&
);
 
 
template<class EquationOfState>
inline ePowerThermo<EquationOfState> operator==
(
    const ePowerThermo<EquationOfState>&,
    const ePowerThermo<EquationOfState>&
);
 
 
template<class EquationOfState>
Ostream& operator<<
(
    Ostream&,
    const ePowerThermo<EquationOfState>&
);
 
 
/*---------------------------------------------------------------------------*\
                        Class ePowerThermo Declaration
\*---------------------------------------------------------------------------*/
 
template<class EquationOfState>
class ePowerThermo
:
    public EquationOfState
{
    // Private Data
 
        scalar c0_;
        scalar n0_;
        scalar Tref_;
        scalar Hf_;
 
 
    // Private Member Functions
 
        //- Check given temperature is within the range of the fitted coeffs
        inline void checkT(const scalar T) const;
 
 
public:
 
    // Constructors
 
        //- Construct from components
        inline ePowerThermo
        (
            const EquationOfState& st,
            const scalar c0,
            const scalar n0,
            const scalar Tref,
            const scalar Hf
        );
 
        //- Construct from name and dictionary
        ePowerThermo(const word& name, const dictionary& dict);
 
        //- Construct as a named copy
        inline ePowerThermo
        (
            const word&,
            const ePowerThermo&
        );
 
         //- Construct and return a clone
        inline autoPtr<ePowerThermo> clone() const;
 
 
    // Member Functions
 
        //- Return the instantiated type name
        static word typeName()
        {
            return "ePower<" + 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;
 
 
    // Member Operators
 
        inline void operator+=(const ePowerThermo&);
 
 
    // Friend operators
 
        friend ePowerThermo operator+ <EquationOfState>
        (
            const ePowerThermo&,
            const ePowerThermo&
        );
 
        friend ePowerThermo operator* <EquationOfState>
        (
            const scalar,
            const ePowerThermo&
        );
 
 
        friend ePowerThermo operator== <EquationOfState>
        (
            const ePowerThermo&,
            const ePowerThermo&
        );
 
 
    // Ostream Operator
 
        friend Ostream& operator<< <EquationOfState>
        (
            Ostream&,
            const ePowerThermo&
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "ePowerThermoI.H"
    #include "ePowerThermo.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //