Class LTPspecies_Arrhenius holds transport parameters for a specific liquid-phase species (LTPspecies) when the transport property is expressed in Arrhenius form. More...

#include <LTPspecies.h>

Inheritance diagram for LTPspecies_Arrhenius:

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Collaboration diagram for LTPspecies_Arrhenius:

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Public Member Functions
	LTPspecies_Arrhenius (const XML_Node &propNode, const std::string name, TransportPropertyType tp_ind, const thermo_t *thermo)
	Construct an LTPspecies object for a liquid transport property expressed in extended Arrhenius form. More...

	LTPspecies_Arrhenius (const LTPspecies_Arrhenius &right)

LTPspecies_Arrhenius &	operator= (const LTPspecies_Arrhenius &right)

virtual LTPspecies *	duplMyselfAsLTPspecies () const
	Duplication routine. More...

doublereal	getSpeciesTransProp ()
	Return the pure species value for this transport property evaluated from the Arrhenius expression. More...

Public Member Functions inherited from LTPspecies
	LTPspecies (const XML_Node const propNode=0, const std::string name="-", TransportPropertyType tp_ind=TP_UNKNOWN, const thermo_t thermo=0)
	Construct an LTPspecies object for a liquid transport property. More...

	LTPspecies (const LTPspecies &right)

LTPspecies &	operator= (const LTPspecies &right)

virtual bool	checkPositive () const
	Check to see if the property evaluation will be positive. More...

doublereal	getMixWeight () const
	Return the weight mixture. More...

Protected Attributes
doublereal	m_temp
	temperature from thermo object More...

doublereal	m_logt
	logarithm of current temperature More...

doublereal	m_prop
	most recent evaluation of transport property More...

doublereal	m_logProp
	logarithm of most recent evaluation of transport property More...

Protected Attributes inherited from LTPspecies
std::string	m_speciesName
	Species Name. More...

LTPTemperatureDependenceType	m_model
	Model type for the temperature dependence. More...

TransportPropertyType	m_property
	enum indicating which property this is (i.e viscosity) More...

vector_fp	m_coeffs
	Model temperature-dependence ceofficients. More...

const thermo_t *	m_thermo
	Pointer to a const thermo object to get current temperature. More...

doublereal	m_mixWeight
	Weighting used for mixing. More...

Detailed Description

Class LTPspecies_Arrhenius holds transport parameters for a specific liquid-phase species (LTPspecies) when the transport property is expressed in Arrhenius form.

Used for pure species properties with equations of the form

\[ x = A T^b \exp( - E / RT ) \]

where A, b, and E are passed in the xml input file.

As an example of the input required for LTPspecies_Arrhenius consider the following XML fragment

*    <species>
*      <!-- thermodynamic properties -->
*      <transport>
*        <viscosity model="Arrhenius">
*           <!-- Janz, JPCRD, 17, supplement 2, 1988 -->
*           <A>6.578e-5</A>
*           <b>0.0</b>
*           <E units="J/kmol">23788.e3</E>
*        </viscosity>
*        <!-- other transport properties -->
*      </transport>
*    </species>
*

Definition at line 241 of file LTPspecies.h.

Constructor & Destructor Documentation

LTPspecies_Arrhenius	(	const XML_Node &	propNode,
		const std::string	name,
		TransportPropertyType	tp_ind,
		const thermo_t *	thermo
	)

Construct an LTPspecies object for a liquid transport property expressed in extended Arrhenius form.

The transport property is constructed from the XML node, <propNode>, that is a child of the <transport> node and specifies a type of transport property (like viscosity)

Parameters

propNode	Reference to the XML node that contains the property information.This class is assumed to be parameterized by reading XML_Node information.
name	String containing the species name
tp_ind	enum TransportPropertyType containing the property id that this object is creating a parameterization for (e.g., viscosity)
thermo	const pointer to the ThermoPhase object, which is used to find the temperature.

Definition at line 154 of file LTPspecies.cpp.

References Cantera::getArrhenius(), LTPspecies::m_coeffs, LTPspecies::m_model, LTPspecies_Arrhenius::m_prop, LTPspecies_Arrhenius::m_temp, and XML_Node::name().

Referenced by LTPspecies_Arrhenius::duplMyselfAsLTPspecies().

Member Function Documentation

LTPspecies * duplMyselfAsLTPspecies ( ) const

virtual

Duplication routine.

Returns: Returns a copy of this routine as a pointer to LTPspecies

Reimplemented from LTPspecies.

Definition at line 192 of file LTPspecies.cpp.

References LTPspecies_Arrhenius::LTPspecies_Arrhenius().

doublereal getSpeciesTransProp ( )

virtual

Return the pure species value for this transport property evaluated from the Arrhenius expression.

In general the Arrhenius expression is

\[ \mu = A T^n \exp( - E / R T ). \]

Note that for viscosity, the convention is such that a positive activation energy corresponds to the typical case of a positive argument to the exponential so that the Arrhenius expression is

\[ \mu = A T^n \exp( + E / R T ). \]

Any temperature and composition dependence will be adjusted internally according to the information provided.

Reimplemented from LTPspecies.

Definition at line 197 of file LTPspecies.cpp.

References LTPspecies::m_coeffs, LTPspecies_Arrhenius::m_logProp, LTPspecies_Arrhenius::m_logt, LTPspecies_Arrhenius::m_prop, LTPspecies::m_property, LTPspecies_Arrhenius::m_temp, LTPspecies::m_thermo, and Phase::temperature().