This class implements the interface to compute the properties of a "standard" polymer electrolyte membrane material. More...

#include <polymer_electrolyte_material_base.h>

Inheritance diagram for FuelCellShop::Material::PolymerElectrolyteBase:

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Collaboration diagram for FuelCellShop::Material::PolymerElectrolyteBase:

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Public Member Functions
Transport properties and derivatives accessor methods
virtual void	sorption_isotherm (std::vector< double > &) const
	Compute the equilibrium water content, \( \lambda_{eq} \), inside the polymer electrolyte for vapor-equilibriated case, at every quadrature point in the cell.

virtual void	sorption_isotherm_derivative (std::map< VariableNames, std::vector< double > > &) const
	Compute the derivatives for water sorption source terms, \( \frac{\partial \lambda_{eq}}{\partial u} \), at every quadrature point in the cell.

virtual void	proton_conductivity (double &) const
	Compute the proton conductivity, \( \sigma_{H^+} \) [`S/cm`], inside the polymer electrolyte for constant case.

virtual void	proton_conductivity (std::vector< double > &) const
	Compute the proton conductivity, \( \sigma_{H^+} \) [`S/cm`], inside the polymer electrolyte, at every quadrature point in the cell.

virtual void	proton_conductivity_derivative (std::map< VariableNames, std::vector< double > > &) const
	Compute the derivatives of proton conductivity at every quadrature point in the cell.

virtual void	water_diffusivity (double &) const
	Compute the water diffusivity, \( D_{\lambda} \) [`cm^2/s`], inside the polymer electrolyte for constant case.

virtual void	water_diffusivity (std::vector< double > &) const
	Compute the water diffusivity, \( D_{\lambda} \) [`cm^2/s`], inside the polymer electrolyte at every quadrature point in the cell.

virtual void	water_diffusivity_derivative (std::map< VariableNames, std::vector< double > > &) const
	Compute the derivatives of water diffusivity at every quadrature point in the cell.

virtual void	electroosmotic_drag (std::vector< double > &) const
	Compute the electro-osmotic drag coefficient inside the polymer electrolyte at every quadrature point in the cell.

virtual void	electroosmotic_drag_derivative (std::map< VariableNames, std::vector< double > > &) const
	Compute the derivatives of electro-osmotic drag coefficient, at every quadrature point in the cell.

virtual void	oxygen_diffusivity (double &) const
	Compute the oxygen diffusivity, [`cm^2/s`], inside the polymer electrolyte for constant case.

virtual void	oxygen_diffusivity (std::vector< double > &) const
	Compute the oxygen diffusivity, [`cm^2/s`], inside the polymer electrolyte at every quadrature point in the cell.

virtual void	oxygen_diffusivity_derivative (std::map< VariableNames, std::vector< double > > &) const
	Compute the derivatives of oxygen diffusivity, at every quadrature point in the cell.

virtual void	proton_diffusivity (double &) const
	Compute the proton diffusivity, [`cm^2/s`], inside the polymer electrolyte for constant case.

Physical properties accessor methods
double	get_density () const
	Get the density [`gm/cm^3`] of the dry polymer electrolyte material.

double	get_H_O2 () const
	Get Henry's constant [`Pa-cm^3/mol`] for oxygen dissolution in the polymer electrolyte.

double	get_H_H2 () const
	Get Henry's constant [`Pa-cm^3/mol`] for hydrogen dissolution in the polymer electrolyte.

double	get_EW () const
	Get Equivalent Weight (grams of dry polymer electrolyte per moles of \( SO_3^- \)) of the polymer electrolyte material.

double	get_permittivity () const
	Get permittivity of the polymer electrolyte material.

Solution setting methods
void	set_p_t (const double &p_t)
	Specify the total pressure in Pascals.

void	set_T (const double &Temp)
	Specify the temperature [`Kelvin`] in the polymer electrolyte for isothermal case.

void	set_lambda (const double &L)
	Specify the water content in the polymer electrolyte for constant lambda case.

void	set_membrane_water_content (const FuelCellShop::SolutionVariable &l_in)
	Set the solution variable, membrane water content \( \lambda \).

void	set_temperature (const FuelCellShop::SolutionVariable &T_in)
	Set the solution variable, temperature \( T \) [`Kelvin`].

void	set_water_molar_fraction (const FuelCellShop::SolutionVariable &x_in)
	Set the solution variable, water vapor molar fraction \( x_{H_2O} \).

Public Member Functions inherited from FuelCellShop::Material::BaseMaterial
void	set_derivative_flags (const std::vector< VariableNames > &flags)
	Set the variables for which you would like to compute the derivatives.

const std::string &	name_material ()
	Return the name of the layer.

virtual void	print_material_properties () const
	This function prints out the material properties.

Static Public Member Functions
Instance Delivery (Public functions)
static void	declare_PolymerElectrolyte_parameters (ParameterHandler &param)
	Function used to declare all the data necessary in the parameter files for all PolymerElectrolyteBase children.

static void	set_PolymerElectrolyte_parameters (const std::vector< std::string > &name_dvar, const std::vector< double > &value_dvar, ParameterHandler &param)

static boost::shared_ptr < FuelCellShop::Material::PolymerElectrolyteBase >	create_PolymerElectrolyte (ParameterHandler &param, std::string polymer_electrolyte_name)
	Function called in create_CatalystLayer and used to select the appropriate PolymerElectrolyteBase children that will be used in the layer.

Protected Types
Instance Delivery (Types)
typedef std::map< std::string, FuelCellShop::Material::PolymerElectrolyteBase * >	_mapFactory
	This object is used to store all objects of type PolymerElectrolyteBase.

Protected Member Functions
Constructors, destructor and parameter initialization
	PolymerElectrolyteBase (std::string name)
	Constructor.

	PolymerElectrolyteBase ()
	Constructor.

virtual	~PolymerElectrolyteBase ()
	Destructor.

virtual void	declare_parameters (ParameterHandler &param) const
	Declare parameters for a parameter file.

virtual void	set_parameters (const std::vector< std::string > &name_dvar, const std::vector< double > &value_dvar, ParameterHandler &param)
	Member function used to change the values in the parameter file for a given list of parameters.

virtual void	initialize (ParameterHandler &param)
	Initialize parameters.

Instance Delivery (Private functions)
virtual boost::shared_ptr < FuelCellShop::Material::PolymerElectrolyteBase >	create_replica ()
	This member function is used to create an object of type PolymerElectrolyteBase.

Protected Member Functions inherited from FuelCellShop::Material::BaseMaterial
	BaseMaterial ()
	Constructor.

	BaseMaterial (const std::string &name)
	Constructor.

virtual	~BaseMaterial ()
	Destructor.

Static Protected Member Functions
Instance Delivery (Private and static)
static _mapFactory *	get_mapFactory ()

Protected Attributes
Numerical constants
double	EW
	Equivalent weight.

double	rho_M
	Dry polymer electrolyte density [`gm/cm^3`].

double	H_O2
	Henry's Constant [`Pa-cm^3/mol`] for dissolution of oxygen.

double	H_H2
	Henry's Constant [`Pa-cm^3/mol`] for dissolution of hydroge.

double	permittivity
	Permittivity of the material.

double	T
	Temperature [`Kelvins`] for isothermal case.

double	lambda
	Membrane water content, \( \lambda \) for constant lambda case.

double	p_total
	Total pressure (in Pascals).

double	sigma_p
	Proton conductivity value [`S/cm`], given in the parameter file; used with "Constant" method.

double	diffusion_w
	Diffusion of water in polymer electrolyte (if constant option is used), [`cm2/s`].

double	given_n_drag
	Given electroosmotic drag value in the parameter file.

double	D_O2
	Diffusion coefficient of oxygen [`cm^2/s`], given in the parameter file.

double	D_Protons
	Diffusion coefficient of protons [`cm^2/s`], given in the parameter file.

Empirical method name strings
std::string	method_conductivity
	Method/Semi-empirical relation to compute protonic conductivity.

std::string	method_sorption
	Method to compute equilibrium water content value from sorption isotherm.

std::string	method_diffusivity
	Method/semi-empirical relation to compute water diffusivity.

std::string	method_electroosmotic_drag
	Method/semi-empirical relation to compute Electro-osmotic drag.

Solution variables
FuelCellShop::SolutionVariable	lambda_var
	Solution variable, membrane water content \( \lambda \).

FuelCellShop::SolutionVariable	T_var
	Solution variable, temperature \( T \).

FuelCellShop::SolutionVariable	xwater_var
	Solution variable, water vapor molar fraction \( x_{H_2O} \).

Protected Attributes inherited from FuelCellShop::Material::BaseMaterial
const std::string	name
	Name of the layer.

std::vector< VariableNames >	derivative_flags
	Flags for derivatives: These flags are used to request derivatives.

Detailed Description

This class implements the interface to compute the properties of a "standard" polymer electrolyte membrane material.

Note that there are many types of polymer electrolye materials such as Nafion, Gore , Flemion membranes etc.. This class serves a common interface for each one of these types. It implements member functions to declare the parameter file for each catalyst, read the parameter file and select the appropriate polymer electrolyte materials based on the user input. It basically has accessor methods for various physical properties and return bulk transport propeties of the materials. These methods are implemented in the children classes. Since, almost all of the transport properties are dependent on solution variables, e.g. membrane_water_content, \( \lambda \), temperature_of_REV, \( T \) etc. Hence it's important to set these solution variables values inside the class, prior to accessing the bulk transport properties, e.g. proton conductivity, \( \sigma_{H^+} \) [S/cm], water diffusivity, \( D_{\lambda} \) [cm^2/s], etc. Besides, the derivatives of these transport properties w.r.t various solution variables can also be returned from this class.

Usage Details:

Author: M. Bhaiya, 2012-13; M. Secanell, 2013

Member Typedef Documentation

typedef std::map< std::string, FuelCellShop::Material::PolymerElectrolyteBase* > FuelCellShop::Material::PolymerElectrolyteBase::_mapFactory

protected

This object is used to store all objects of type PolymerElectrolyteBase.

Constructor & Destructor Documentation

FuelCellShop::Material::PolymerElectrolyteBase::PolymerElectrolyteBase ( std::string name )

inlineprotected

Constructor.

References lambda, p_total, and T.

FuelCellShop::Material::PolymerElectrolyteBase::PolymerElectrolyteBase ( )

inlineprotected

Constructor.

References lambda, p_total, and T.

virtual FuelCellShop::Material::PolymerElectrolyteBase::~PolymerElectrolyteBase ( )

inlineprotectedvirtual

Destructor.

Member Function Documentation

static boost::shared_ptr<FuelCellShop::Material::PolymerElectrolyteBase > FuelCellShop::Material::PolymerElectrolyteBase::create_PolymerElectrolyte	(	ParameterHandler &	param,
		std::string	polymer_electrolyte_name
	)

inlinestatic

Function called in create_CatalystLayer and used to select the appropriate PolymerElectrolyteBase children that will be used in the layer.

The name of the PolymerElectrolyteBase children object to be used is provided in polymer_electrolyte_name.

The name of the PolymerElectrolyteBase children object is provided in the ParameterHandler in the CatalystLayer subsection as follows:

subsection Catalyst Layer Properties <- This name is the name of the catalyst layer subsection where the kinetics are taking place.
(...)
  set Polymer Electrolyte type = Nafion
(...)
end

current options are [ Nafion ]

References get_mapFactory().

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virtual boost::shared_ptr<FuelCellShop::Material::PolymerElectrolyteBase > FuelCellShop::Material::PolymerElectrolyteBase::create_replica ( )

inlineprotectedvirtual

This member function is used to create an object of type PolymerElectrolyteBase.

Warning: This class MUST be redeclared in every child.

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::declare_parameters ( ParameterHandler & param ) const

inlineprotectedvirtual

Declare parameters for a parameter file.

Warning: This is a PureFunction and it does not declare anything, so please do not call this function in the children.

Reimplemented from FuelCellShop::Material::BaseMaterial.

Reimplemented in FuelCellShop::Material::Nafion.

static void FuelCellShop::Material::PolymerElectrolyteBase::declare_PolymerElectrolyte_parameters ( ParameterHandler & param )

inlinestatic

Function used to declare all the data necessary in the parameter files for all PolymerElectrolyteBase children.

References get_mapFactory().

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virtual void FuelCellShop::Material::PolymerElectrolyteBase::electroosmotic_drag ( std::vector< double > & ) const

inlinevirtual

Compute the electro-osmotic drag coefficient inside the polymer electrolyte at every quadrature point in the cell.

It takes vector as an input argument and values are passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::electroosmotic_drag_derivative ( std::map< VariableNames, std::vector< double > > & ) const

inlinevirtual

Compute the derivatives of electro-osmotic drag coefficient, at every quadrature point in the cell.

The derivatives are computed based on the flags set by the set_derivative_flags method. It takes map as an input argument by reference, in which Key corresponds to the variable about which derivative is being computed, i.e., VariableNames and Value corresponds to the vector storing the derivative values.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

double FuelCellShop::Material::PolymerElectrolyteBase::get_density ( ) const

inline

Get the density [gm/cm^3] of the dry polymer electrolyte material.

References rho_M.

double FuelCellShop::Material::PolymerElectrolyteBase::get_EW ( ) const

inline

Get Equivalent Weight (grams of dry polymer electrolyte per moles of \( SO_3^- \)) of the polymer electrolyte material.

References EW.

double FuelCellShop::Material::PolymerElectrolyteBase::get_H_H2 ( ) const

inline

Get Henry's constant [Pa-cm^3/mol] for hydrogen dissolution in the polymer electrolyte.

References H_H2.

double FuelCellShop::Material::PolymerElectrolyteBase::get_H_O2 ( ) const

inline

Get Henry's constant [Pa-cm^3/mol] for oxygen dissolution in the polymer electrolyte.

References H_O2.

static _mapFactory* FuelCellShop::Material::PolymerElectrolyteBase::get_mapFactory ( )

inlinestaticprotected

Referenced by create_PolymerElectrolyte(), declare_PolymerElectrolyte_parameters(), and set_PolymerElectrolyte_parameters().

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double FuelCellShop::Material::PolymerElectrolyteBase::get_permittivity ( ) const

inline

Get permittivity of the polymer electrolyte material.

References permittivity.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::initialize ( ParameterHandler & param )

inlineprotectedvirtual

Initialize parameters.

Warning: This is a PureFunction and it does not declare anything, so please do not call this function in the children.

Reimplemented from FuelCellShop::Material::BaseMaterial.

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::oxygen_diffusivity ( double & ) const

inlinevirtual

Compute the oxygen diffusivity, [cm^2/s], inside the polymer electrolyte for constant case.

It takes a double as an input argument and value is passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::oxygen_diffusivity ( std::vector< double > & ) const

inlinevirtual

Compute the oxygen diffusivity, [cm^2/s], inside the polymer electrolyte at every quadrature point in the cell.

It takes vector as an input argument and values are passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::oxygen_diffusivity_derivative ( std::map< VariableNames, std::vector< double > > & ) const

inlinevirtual

Compute the derivatives of oxygen diffusivity, at every quadrature point in the cell.

The derivatives are computed based on the flags set by the set_derivative_flags method. It takes map as an input argument by reference, in which Key corresponds to the variable about which derivative is being computed, i.e., VariableNames and Value corresponds to the vector storing the derivative values.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::proton_conductivity ( double & ) const

inlinevirtual

Compute the proton conductivity, \( \sigma_{H^+} \) [S/cm], inside the polymer electrolyte for constant case.

It takes a double as an input argument and value is passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::proton_conductivity ( std::vector< double > & ) const

inlinevirtual

Compute the proton conductivity, \( \sigma_{H^+} \) [S/cm], inside the polymer electrolyte, at every quadrature point in the cell.

It takes vector as an input argument and values are passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::proton_conductivity_derivative ( std::map< VariableNames, std::vector< double > > & ) const

inlinevirtual

Compute the derivatives of proton conductivity at every quadrature point in the cell.

The derivatives are computed based on the flags set by the set_derivative_flags method. It takes map as an input argument by reference, in which Key corresponds to the variable about which derivative is being computed, i.e., VariableNames and Value corresponds to the vector storing the derivative values.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::proton_diffusivity ( double & ) const

inlinevirtual

Compute the proton diffusivity, [cm^2/s], inside the polymer electrolyte for constant case.

It takes a double as an input argument and value is passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

void FuelCellShop::Material::PolymerElectrolyteBase::set_lambda ( const double & L )

inline

Specify the water content in the polymer electrolyte for constant lambda case.

References lambda.

void FuelCellShop::Material::PolymerElectrolyteBase::set_membrane_water_content ( const FuelCellShop::SolutionVariable & l_in )

inline

Set the solution variable, membrane water content \( \lambda \).

It also initializes the temperature solution variable, if it isn't initialized yet. This will help in the case of isothermal applications. set_T method should be used in the initialization of the application to ensure that temperature value is set for isothermal case, otherwise default value 0.0 will be used leading to wrong results.

References FuelCellShop::SolutionVariable::get_variablename(), FuelCellShop::SolutionVariable::is_initialized(), lambda_var, membrane_water_content, T, T_var, and temperature_of_REV.

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void FuelCellShop::Material::PolymerElectrolyteBase::set_p_t ( const double & p_t )

inline

Specify the total pressure in Pascals.

References p_total.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::set_parameters	(	const std::vector< std::string > &	name_dvar,
		const std::vector< double > &	value_dvar,
		ParameterHandler &	param
	)

inlineprotectedvirtual

Member function used to change the values in the parameter file for a given list of parameters.

name_dvar should ideally contain the string as it would appear in the input file, i.e. "diffusion_w"
value_dvar contains the value that the variable should be set at
param is the ParameterHandler that contains all the information that has been read from file

Warning: This is a PureFunction and it does not declare anything, so please do not call this function in the children.

Reimplemented from FuelCellShop::Material::BaseMaterial.

Reimplemented in FuelCellShop::Material::Nafion.

static void FuelCellShop::Material::PolymerElectrolyteBase::set_PolymerElectrolyte_parameters	(	const std::vector< std::string > &	name_dvar,
		const std::vector< double > &	value_dvar,
		ParameterHandler &	param
	)

inlinestatic

References get_mapFactory().

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void FuelCellShop::Material::PolymerElectrolyteBase::set_T ( const double & Temp )

inline

Specify the temperature [Kelvin] in the polymer electrolyte for isothermal case.

References T.

void FuelCellShop::Material::PolymerElectrolyteBase::set_temperature ( const FuelCellShop::SolutionVariable & T_in )

inline

Set the solution variable, temperature \( T \) [Kelvin].

It also initializes the lambda solution variable, it it isn't initialized yet. This will help in the case of applications where \( \lambda \) is not being solved for. Membrane water content value is defaulted to 12.0, in case if different value is required, use set_lambda method.

References FuelCellShop::SolutionVariable::get_variablename(), FuelCellShop::SolutionVariable::is_initialized(), lambda, lambda_var, membrane_water_content, T_var, and temperature_of_REV.

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void FuelCellShop::Material::PolymerElectrolyteBase::set_water_molar_fraction ( const FuelCellShop::SolutionVariable & x_in )

inline

Set the solution variable, water vapor molar fraction \( x_{H_2O} \).

It also initializes the temperature solution variable, if it isn't initialized yet. This will help in the case of isothermal applications. set_T method should be used in the initialization of the application to ensure that temperature value is set for isothermal case, otherwise default value 0.0 will be used leading to wrong results. Also, total pressure should be set using set_p_t method.

References FuelCellShop::SolutionVariable::get_variablename(), FuelCellShop::SolutionVariable::is_initialized(), T, T_var, temperature_of_REV, water_molar_fraction, and xwater_var.

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virtual void FuelCellShop::Material::PolymerElectrolyteBase::sorption_isotherm ( std::vector< double > & ) const

inlinevirtual

Compute the equilibrium water content, \( \lambda_{eq} \), inside the polymer electrolyte for vapor-equilibriated case, at every quadrature point in the cell.

It takes a vector as an input argument and values are passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::sorption_isotherm_derivative ( std::map< VariableNames, std::vector< double > > & ) const

inlinevirtual

Compute the derivatives for water sorption source terms, \( \frac{\partial \lambda_{eq}}{\partial u} \), at every quadrature point in the cell.

The derivatives are computed based on the flags set by the set_derivative_flags method. It takes map as an input argument by reference, in which Key corresponds to the variable about which derivative is being computed, i.e., VariableNames and Value corresponds to the vector storing the derivative values.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::water_diffusivity ( double & ) const

inlinevirtual

Compute the water diffusivity, \( D_{\lambda} \) [cm^2/s], inside the polymer electrolyte for constant case.

It takes a double as an input argument and value is passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::water_diffusivity ( std::vector< double > & ) const

inlinevirtual

Compute the water diffusivity, \( D_{\lambda} \) [cm^2/s], inside the polymer electrolyte at every quadrature point in the cell.

It takes vector as an input argument and values are passed by reference.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

virtual void FuelCellShop::Material::PolymerElectrolyteBase::water_diffusivity_derivative ( std::map< VariableNames, std::vector< double > > & ) const

inlinevirtual

Compute the derivatives of water diffusivity at every quadrature point in the cell.

The derivatives are computed based on the flags set by the set_derivative_flags method. It takes map as an input argument by reference, in which Key corresponds to the variable about which derivative is being computed, i.e., VariableNames and Value corresponds to the vector storing the derivative values.

Note: This is an abstract virtual function. Please look at the child classes for its reimplementations (if any).

Reimplemented in FuelCellShop::Material::Nafion.

Member Data Documentation

double FuelCellShop::Material::PolymerElectrolyteBase::D_O2

protected

Diffusion coefficient of oxygen [cm^2/s], given in the parameter file.

double FuelCellShop::Material::PolymerElectrolyteBase::D_Protons

protected

Diffusion coefficient of protons [cm^2/s], given in the parameter file.

double FuelCellShop::Material::PolymerElectrolyteBase::diffusion_w

protected

Diffusion of water in polymer electrolyte (if constant option is used), [cm2/s].

double FuelCellShop::Material::PolymerElectrolyteBase::EW

protected

Equivalent weight.

Referenced by get_EW().

double FuelCellShop::Material::PolymerElectrolyteBase::given_n_drag

protected

Given electroosmotic drag value in the parameter file.

This value will be used when method_electroosmotic_drag is set to "Constant".

double FuelCellShop::Material::PolymerElectrolyteBase::H_H2

protected

Henry's Constant [Pa-cm^3/mol] for dissolution of hydroge.

Referenced by get_H_H2().

double FuelCellShop::Material::PolymerElectrolyteBase::H_O2

protected

Henry's Constant [Pa-cm^3/mol] for dissolution of oxygen.

Referenced by get_H_O2().

double FuelCellShop::Material::PolymerElectrolyteBase::lambda

protected

Membrane water content, \( \lambda \) for constant lambda case.

In order to update this value, use set_lambda method.

Referenced by PolymerElectrolyteBase(), set_lambda(), and set_temperature().

FuelCellShop::SolutionVariable FuelCellShop::Material::PolymerElectrolyteBase::lambda_var

protected

Solution variable, membrane water content \( \lambda \).

Referenced by set_membrane_water_content(), and set_temperature().

std::string FuelCellShop::Material::PolymerElectrolyteBase::method_conductivity

protected

Method/Semi-empirical relation to compute protonic conductivity.

Referenced by FuelCellShop::Material::Nafion::modify_parameters().

std::string FuelCellShop::Material::PolymerElectrolyteBase::method_diffusivity

protected

Method/semi-empirical relation to compute water diffusivity.

Referenced by FuelCellShop::Material::Nafion::modify_parameters().

std::string FuelCellShop::Material::PolymerElectrolyteBase::method_electroosmotic_drag

protected

Method/semi-empirical relation to compute Electro-osmotic drag.

Referenced by FuelCellShop::Material::Nafion::modify_parameters().

std::string FuelCellShop::Material::PolymerElectrolyteBase::method_sorption

protected

Method to compute equilibrium water content value from sorption isotherm.

Referenced by FuelCellShop::Material::Nafion::modify_parameters().

double FuelCellShop::Material::PolymerElectrolyteBase::p_total

protected

Total pressure (in Pascals).

In order to update this value, use set_p_t method.

Referenced by PolymerElectrolyteBase(), and set_p_t().

double FuelCellShop::Material::PolymerElectrolyteBase::permittivity

protected

Permittivity of the material.

Referenced by get_permittivity().

double FuelCellShop::Material::PolymerElectrolyteBase::rho_M

protected

Dry polymer electrolyte density [gm/cm^3].

Referenced by get_density().

double FuelCellShop::Material::PolymerElectrolyteBase::sigma_p

protected

Proton conductivity value [S/cm], given in the parameter file; used with "Constant" method.

double FuelCellShop::Material::PolymerElectrolyteBase::T

protected

Temperature [Kelvins] for isothermal case.

In order to update this value, use set_T method.

Referenced by PolymerElectrolyteBase(), set_membrane_water_content(), set_T(), and set_water_molar_fraction().

FuelCellShop::SolutionVariable FuelCellShop::Material::PolymerElectrolyteBase::T_var

protected

Solution variable, temperature \( T \).

Referenced by set_membrane_water_content(), set_temperature(), and set_water_molar_fraction().

FuelCellShop::SolutionVariable FuelCellShop::Material::PolymerElectrolyteBase::xwater_var

protected

Solution variable, water vapor molar fraction \( x_{H_2O} \).

Referenced by set_water_molar_fraction().

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

polymer_electrolyte_material_base.h

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