The 5-parameter SRI falloff function. More...

Inheritance diagram for SRI5:

Collaboration diagram for SRI5:

Public Member Functions
	SRI5 ()
	Constructor. More...

virtual void	init (const vector_fp &c)
	Initialization of the object. More...

virtual void	updateTemp (doublereal T, doublereal *work) const
	Update the temperature parameters in the representation. More...

virtual doublereal	F (doublereal pr, const doublereal *work) const
	The falloff function. More...

virtual size_t	workSize ()
	The size of the work array required. More...

Public Member Functions inherited from Falloff
	Falloff ()
	Default constructor is empty. More...

virtual	~Falloff ()
	default destructor is empty More...

Protected Attributes
doublereal	m_a
	parameter a in the 5-parameter SRI falloff function. This is unitless. More...

doublereal	m_b
	parameter b in the 5-parameter SRI falloff function. More...

doublereal	m_c
	parameter c in the 5-parameter SRI falloff function. More...

doublereal	m_d
	parameter d in the 5-parameter SRI falloff function. This is unitless. More...

doublereal	m_e
	parameter d in the 5-parameter SRI falloff function. This is unitless. More...

Detailed Description

The 5-parameter SRI falloff function.

The falloff function defines the value of \( F \) in the following rate expression

\[ k = k_{\infty} \left( \frac{P_r}{1 + P_r} \right) F \]

where

\[ P_r = \frac{k_0 [M]}{k_{\infty}} \]

\[ F = {\left( a \; exp(\frac{-b}{T}) + exp(\frac{-T}{c})\right)}^n \; d \; exp(\frac{-e}{T}) \]

where

\[ n = \frac{1.0}{1.0 + {\log_{10} P_r}^2} \]

\( c \) s required to greater than or equal to zero. If it is zero, then the corresponding term is set to zero.

m_c is required to greater than or equal to zero. If it is zero, then the corresponding term is set to zero.

m_d is required to be greater than zero.

Definition at line 317 of file FalloffFactory.cpp.

Constructor & Destructor Documentation

SRI5 ( )

inline

Constructor.

Definition at line 321 of file FalloffFactory.cpp.

Member Function Documentation

virtual void init ( const vector_fp & c )

inlinevirtual

Initialization of the object.

Parameters

c	Vector of five doubles: The doubles are the parameters, a, b, c, d, and e of the SRI parameterization

Reimplemented from Falloff.

Definition at line 328 of file FalloffFactory.cpp.

References Cantera::fp2str(), SRI5::m_a, SRI5::m_b, SRI5::m_c, SRI5::m_d, and SRI5::m_e.

virtual void updateTemp	(	doublereal	T,
		doublereal *	work
	)		const

inlinevirtual

Update the temperature parameters in the representation.

The workspace has a length of two

Parameters

T	Temperature (Kelvin)
work	Vector of working space representing the temperature dependent part of the parameterization.

Reimplemented from Falloff.

Definition at line 353 of file FalloffFactory.cpp.

References SRI5::m_a, SRI5::m_b, SRI5::m_c, SRI5::m_d, and SRI5::m_e.

virtual doublereal F	(	doublereal	pr,
		const doublereal *	work
	)		const

inlinevirtual

The falloff function.

This is defined so that the rate coefficient is

\[ k = F(Pr)\frac{Pr}{1 + Pr}. \]

Here \( Pr \) is the reduced pressure, defined by

\[ Pr = \frac{k_0 [M]}{k_\infty}. \]

Parameters

pr	reduced pressure (dimensionless).
work	array of size workSize() containing cached temperature-dependent intermediate results from a prior call to updateTemp.