Cantera
2.1.2
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The 5-parameter SRI falloff function. More...
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... | |
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.
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inline |
Constructor.
Definition at line 321 of file FalloffFactory.cpp.
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inlinevirtual |
Initialization of the object.
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.
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inlinevirtual |
Update the temperature parameters in the representation.
The workspace has a length of two
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.
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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
\[ Pr = \frac{k_0 [M]}{k_\infty}. \]
pr | reduced pressure (dimensionless). |
work | array of size workSize() containing cached temperature-dependent intermediate results from a prior call to updateTemp. |
Reimplemented from Falloff.
Definition at line 361 of file FalloffFactory.cpp.
References Cantera::SmallNumber.
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inlinevirtual |
The size of the work array required.
Reimplemented from Falloff.
Definition at line 367 of file FalloffFactory.cpp.
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protected |
parameter a in the 5-parameter SRI falloff function. This is unitless.
Definition at line 373 of file FalloffFactory.cpp.
Referenced by SRI5::init(), and SRI5::updateTemp().
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protected |
parameter b in the 5-parameter SRI falloff function.
This has units of Kelvin.
Definition at line 377 of file FalloffFactory.cpp.
Referenced by SRI5::init(), and SRI5::updateTemp().
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protected |
parameter c in the 5-parameter SRI falloff function.
This has units of Kelvin.
Definition at line 381 of file FalloffFactory.cpp.
Referenced by SRI5::init(), and SRI5::updateTemp().
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protected |
parameter d in the 5-parameter SRI falloff function. This is unitless.
Definition at line 384 of file FalloffFactory.cpp.
Referenced by SRI5::init(), and SRI5::updateTemp().
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protected |
parameter d in the 5-parameter SRI falloff function. This is unitless.
Definition at line 387 of file FalloffFactory.cpp.
Referenced by SRI5::init(), and SRI5::updateTemp().