Cantera  2.3.0

A constant-heat capacity species thermodynamic property manager class. More...

#include <ConstCpPoly.h>

Inheritance diagram for ConstCpPoly:
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Collaboration diagram for ConstCpPoly:
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## Public Member Functions

ConstCpPoly ()
empty constructor More...

ConstCpPoly (double tlow, double thigh, double pref, const double *coeffs)
Normal constructor. More...

virtual SpeciesThermoInterpTypeduplMyselfAsSpeciesThermoInterpType () const

virtual int reportType () const
Returns an integer representing the type of parameterization. More...

void updateProperties (const doublereal *tt, doublereal *cp_R, doublereal *h_RT, doublereal *s_R) const
Update the properties for this species, given a temperature polynomial. More...

void updatePropertiesTemp (const doublereal temp, doublereal *cp_R, doublereal *h_RT, doublereal *s_R) const
Compute the reference-state property of one species. More...

void reportParameters (size_t &n, int &type, doublereal &tlow, doublereal &thigh, doublereal &pref, doublereal *const coeffs) const
This utility function reports back the type of parameterization and all of the parameters for the species. More...

virtual void modifyParameters (doublereal *coeffs)

virtual doublereal reportHf298 (doublereal *const h298=0) const
Report the 298 K Heat of Formation of the standard state of one species (J kmol-1) More...

virtual void modifyOneHf298 (const size_t k, const doublereal Hf298New)
Modify the value of the 298 K Heat of Formation of one species in the phase (J kmol-1) More...

virtual void resetHf298 ()
Restore the original heat of formation for this species. More...

Public Member Functions inherited from SpeciesThermoInterpType
SpeciesThermoInterpType (double tlow, double thigh, double pref)

SpeciesThermoInterpType (const SpeciesThermoInterpType &b)

SpeciesThermoInterpTypeoperator= (const SpeciesThermoInterpType &b)

virtual doublereal minTemp () const
Returns the minimum temperature that the thermo parameterization is valid. More...

virtual doublereal maxTemp () const
Returns the maximum temperature that the thermo parameterization is valid. More...

virtual doublereal refPressure () const
Returns the reference pressure (Pa) More...

virtual void validate (const std::string &name)
Check for problems with the parameterization, and generate warnings or throw and exception if any are found. More...

virtual size_t temperaturePolySize () const
Number of terms in the temperature polynomial for this parameterization. More...

virtual void updateTemperaturePoly (double T, double *T_poly) const
Given the temperature T, compute the terms of the temperature polynomial T_poly. More...

## Protected Attributes

doublereal m_t0
Base temperature. More...

doublereal m_cp0_R
Dimensionless value of the heat capacity. More...

doublereal m_h0_R
dimensionless value of the enthaply at t0 More...

doublereal m_s0_R
Dimensionless value of the entropy at t0. More...

doublereal m_logt0
log of the t0 value More...

double m_h0_R_orig
Original value of h0_R, restored by calling resetHf298() More...

Protected Attributes inherited from SpeciesThermoInterpType
doublereal m_lowT
lowest valid temperature More...

doublereal m_highT
Highest valid temperature. More...

doublereal m_Pref
Reference state pressure. More...

## Detailed Description

A constant-heat capacity species thermodynamic property manager class.

This makes the assumption that the heat capacity is a constant. Then, the following relations are used to complete the specification of the thermodynamic functions for the species.

$\frac{c_p(T)}{R} = Cp0\_R$

$\frac{h^0(T)}{RT} = \frac{1}{T} * (h0\_R + (T - T_0) * Cp0\_R)$

$\frac{s^0(T)}{R} = (s0\_R + (log(T) - log(T_0)) * Cp0\_R)$

This parameterization takes 4 input values. These are:

• c[0] = $$T_0$$(Kelvin)
• c[1] = $$H_k^o(T_0, p_{ref})$$ (J/kmol)
• c[2] = $$S_k^o(T_0, p_{ref})$$ (J/kmol K)
• c[3] = $${Cp}_k^o(T_0, p_{ref})$$ (J(kmol K)

Definition at line 43 of file ConstCpPoly.h.

## ◆ ConstCpPoly() [1/2]

 ConstCpPoly ( )

empty constructor

Deprecated:
To be removed after Cantera 2.3.

Definition at line 15 of file ConstCpPoly.cpp.

References Cantera::warn_deprecated().

Referenced by ConstCpPoly::duplMyselfAsSpeciesThermoInterpType().

## ◆ ConstCpPoly() [2/2]

 ConstCpPoly ( double tlow, double thigh, double pref, const double * coeffs )

Normal constructor.

Parameters
 tlow Minimum temperature thigh Maximum temperature pref reference pressure (Pa). coeffs Vector of coefficients used to set the parameters for the standard state for species n. There are 4 coefficients for the ConstCpPoly parameterization. c[0] = $$T_0$$(Kelvin) c[1] = $$H_k^o(T_0, p_{ref})$$ (J/kmol) c[2] = $$S_k^o(T_0, p_{ref})$$ (J/kmol K) c[3] = $${Cp}_k^o(T_0, p_{ref})$$ (J(kmol K)

Definition at line 26 of file ConstCpPoly.cpp.

## ◆ duplMyselfAsSpeciesThermoInterpType()

 SpeciesThermoInterpType * duplMyselfAsSpeciesThermoInterpType ( ) const
virtual
Deprecated:
To be removed after Cantera 2.3 for all classes derived from SpeciesThermoInterpType.

Implements SpeciesThermoInterpType.

Definition at line 39 of file ConstCpPoly.cpp.

References ConstCpPoly::ConstCpPoly().

## ◆ reportType()

 virtual int reportType ( ) const
inlinevirtual

Returns an integer representing the type of parameterization.

Implements SpeciesThermoInterpType.

Definition at line 68 of file ConstCpPoly.h.

References CONSTANT_CP.

## ◆ updateProperties()

 void updateProperties ( const doublereal * tt, doublereal * cp_R, doublereal * h_RT, doublereal * s_R ) const
virtual

Update the properties for this species, given a temperature polynomial.

This method is called with a pointer to an array containing the functions of temperature needed by this parameterization, and three pointers to arrays where the computed property values should be written. This method updates only one value in each array.

The form and length of the Temperature Polynomial may vary depending on the parameterization.

Parameters
 tt vector of evaluated temperature functions cp_R Vector of Dimensionless heat capacities. (length m_kk). h_RT Vector of Dimensionless enthalpies. (length m_kk). s_R Vector of Dimensionless entropies. (length m_kk).

Form and Length of the temperature polynomial:

• m_t[0] = tt;

Reimplemented from SpeciesThermoInterpType.

Definition at line 44 of file ConstCpPoly.cpp.

## ◆ updatePropertiesTemp()

 void updatePropertiesTemp ( const doublereal temp, doublereal * cp_R, doublereal * h_RT, doublereal * s_R ) const
virtual

Compute the reference-state property of one species.

Given temperature T in K, this method updates the values of the non- dimensional heat capacity at constant pressure, enthalpy, and entropy, at the reference pressure, of the species.

Parameters
 temp Temperature (Kelvin) cp_R Vector of Dimensionless heat capacities. (length m_kk). h_RT Vector of Dimensionless enthalpies. (length m_kk). s_R Vector of Dimensionless entropies. (length m_kk).

Implements SpeciesThermoInterpType.

Definition at line 57 of file ConstCpPoly.cpp.

## ◆ reportParameters()

 void reportParameters ( size_t & index, int & type, doublereal & minTemp, doublereal & maxTemp, doublereal & refPressure, doublereal *const coeffs ) const
virtual

This utility function reports back the type of parameterization and all of the parameters for the species.

All parameters are output variables

Parameters
 index Species index type Integer type of the standard type minTemp output - Minimum temperature maxTemp output - Maximum temperature refPressure output - reference pressure (Pa). coeffs Vector of coefficients used to set the parameters for the standard state.

Implements SpeciesThermoInterpType.

Definition at line 69 of file ConstCpPoly.cpp.

## ◆ modifyParameters()

 void modifyParameters ( doublereal * coeffs )
virtual
Deprecated:
To be removed after Cantera 2.3.

Reimplemented from SpeciesThermoInterpType.

Definition at line 85 of file ConstCpPoly.cpp.

## ◆ reportHf298()

 doublereal reportHf298 ( doublereal *const h298 = 0 ) const
virtual

Report the 298 K Heat of Formation of the standard state of one species (J kmol-1)

The 298K Heat of Formation is defined as the enthalpy change to create the standard state of the species from its constituent elements in their standard states at 298 K and 1 bar.

Parameters
 h298 If this is nonnull, the current value of the Heat of Formation at 298K and 1 bar for species m_speciesIndex is returned in h298[m_speciesIndex].
Returns
the current value of the Heat of Formation at 298K and 1 bar for species m_speciesIndex.

Reimplemented from SpeciesThermoInterpType.

Definition at line 96 of file ConstCpPoly.cpp.

Referenced by ConstCpPoly::modifyOneHf298().

## ◆ modifyOneHf298()

 void modifyOneHf298 ( const size_t k, const doublereal Hf298New )
virtual

Modify the value of the 298 K Heat of Formation of one species in the phase (J kmol-1)

The 298K heat of formation is defined as the enthalpy change to create the standard state of the species from its constituent elements in their standard states at 298 K and 1 bar.

Parameters
 k Species k Hf298New Specify the new value of the Heat of Formation at 298K and 1 bar

Reimplemented from SpeciesThermoInterpType.

Definition at line 106 of file ConstCpPoly.cpp.

References Cantera::GasConstant, ConstCpPoly::m_h0_R, and ConstCpPoly::reportHf298().

## ◆ resetHf298()

 void resetHf298 ( )
virtual

Restore the original heat of formation for this species.

Reimplemented from SpeciesThermoInterpType.

Definition at line 113 of file ConstCpPoly.cpp.

References ConstCpPoly::m_h0_R, and ConstCpPoly::m_h0_R_orig.

## ◆ m_t0

 doublereal m_t0
protected

Base temperature.

Definition at line 101 of file ConstCpPoly.h.

## ◆ m_cp0_R

 doublereal m_cp0_R
protected

Dimensionless value of the heat capacity.

Definition at line 103 of file ConstCpPoly.h.

## ◆ m_h0_R

 doublereal m_h0_R
protected

dimensionless value of the enthaply at t0

Definition at line 105 of file ConstCpPoly.h.

## ◆ m_s0_R

 doublereal m_s0_R
protected

Dimensionless value of the entropy at t0.

Definition at line 107 of file ConstCpPoly.h.

## ◆ m_logt0

 doublereal m_logt0
protected

log of the t0 value

Definition at line 109 of file ConstCpPoly.h.

## ◆ m_h0_R_orig

 double m_h0_R_orig
protected

Original value of h0_R, restored by calling resetHf298()

Definition at line 111 of file ConstCpPoly.h.

Referenced by ConstCpPoly::ConstCpPoly(), and ConstCpPoly::resetHf298().

The documentation for this class was generated from the following files: