A class for flow controllers where the flow rate is equal to the flow rate of a primary mass flow controller plus a correction proportional to the pressure difference between the inlet and outlet. More...

#include <flowControllers.h>

Inheritance diagram for PressureController:

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Detailed Description

A class for flow controllers where the flow rate is equal to the flow rate of a primary mass flow controller plus a correction proportional to the pressure difference between the inlet and outlet.

The device coefficient c sets the proportionality constant between pressure drop and mass flow rate and has units of kg/s/Pa. The mass flow rate is computed as:

\[\dot{m} = \dot{m}_{primary} + c f(\Delta P) \]

where f is a functions of pressure drop that is set by setPressureFunction. If no functions is specified, the mass flow rate defaults to:

\[\dot{m} = \dot{m}_{primary} + c \Delta P \]

Definition at line 85 of file flowControllers.h.

Public Member Functions
string	type () const override
	String indicating the connector implemented.

bool	ready () override

void	setPrimary (shared_ptr< ConnectorNode > primary) override
	Set the primary mass flow controller.

void	setPrimary (FlowDevice *primary)
	Set the primary mass flow controller.

void	setTimeFunction (Func1 *g) override
	Set a function of time that is used in determining the mass flow rate through the device.

void	setTimeFunction (shared_ptr< Func1 > f) override
	Set a function of time to modulate the mass flow rate.

void	setPressureCoeff (double c)
	Set the proportionality constant between pressure drop and mass flow rate.

double	getPressureCoeff ()
	Get the pressure coefficient.

void	updateMassFlowRate (double time) override
	Update the mass flow rate at time 'time'.

	FlowDevice (shared_ptr< ReactorBase > r0, shared_ptr< ReactorBase > r1, const string &name="(none)")

Public Member Functions inherited from FlowDevice
	FlowDevice (shared_ptr< ReactorBase > r0, shared_ptr< ReactorBase > r1, const string &name="(none)")

string	type () const override
	String indicating the connector implemented.

double	massFlowRate ()
	Mass flow rate (kg/s).

virtual void	updateMassFlowRate (double time)
	Update the mass flow rate at time 'time'.

virtual void	setMassFlowRate (double mdot)
	Set the fixed mass flow rate (kg/s) through a flow device.

double	deviceCoefficient () const
	Get the device coefficient (defined by derived class).

void	setDeviceCoefficient (double c)
	Set the device coefficient (defined by derived class).

virtual void	setPrimary (shared_ptr< ConnectorNode > primary)
	Set the primary mass flow controller.

double	outletSpeciesMassFlowRate (size_t k)
	Mass flow rate (kg/s) of outlet species k.

double	enthalpy_mass ()
	specific enthalpy

bool	install (ReactorBase &in, ReactorBase &out)
	Install a flow device between two reactors.

virtual bool	ready ()

ReactorBase &	in () const
	Return a reference to the upstream reactor.

const ReactorBase &	out () const
	Return a const reference to the downstream reactor.

ReactorBase &	out ()
	Return a mutable reference to the downstream reactor.

double	evalPressureFunction ()
	Return current value of the pressure function.

virtual void	setPressureFunction (Func1 *f)
	Set a function of pressure that is used in determining the mass flow rate through the device.

virtual void	setPressureFunction (shared_ptr< Func1 > f)
	Set a function of pressure to modify the pressure response.

double	evalTimeFunction ()
	Return current value of the time function.

virtual void	setTimeFunction (Func1 *g)
	Set a function of time that is used in determining the mass flow rate through the device.

virtual void	setTimeFunction (shared_ptr< Func1 > g)
	Set a function of time to modulate the mass flow rate.

void	setSimTime (double time)
	Set current reactor network time.

	ConnectorNode (const string &name="(none)")
	Transitional constructor.

	ConnectorNode (shared_ptr< ReactorBase > r0, shared_ptr< ReactorBase > r1, const string &name="(none)")
	Instantiate a ConnectorNode object with associated ReactorBase objects.

	ConnectorNode (const ConnectorNode &)=delete

Public Member Functions inherited from ConnectorNode
	ConnectorNode (const string &name="(none)")
	Transitional constructor.

	ConnectorNode (shared_ptr< ReactorBase > r0, shared_ptr< ReactorBase > r1, const string &name="(none)")
	Instantiate a ConnectorNode object with associated ReactorBase objects.

	ConnectorNode (const ConnectorNode &)=delete

ConnectorNode &	operator= (const ConnectorNode &)=delete

virtual string	type () const
	String indicating the connector implemented.

string	name () const
	Retrieve connector name.

void	setName (const string &name)
	Set connector name.

void	setDefaultName (map< string, int > &counts)
	Set the default name of a connector. Returns `false` if it was previously set.

Protected Attributes
FlowDevice *	m_primary = nullptr

Protected Attributes inherited from FlowDevice
double	m_mdot = Undef

Func1 *	m_pfunc = nullptr
	Function set by setPressureFunction; used by updateMassFlowRate.

Func1 *	m_tfunc = nullptr
	Function set by setTimeFunction; used by updateMassFlowRate.

double	m_coeff = 1.0
	Coefficient set by derived classes; used by updateMassFlowRate.

double	m_time = 0.
	Current reactor network time.

Protected Attributes inherited from ConnectorNode
pair< shared_ptr< ReactorBase >, shared_ptr< ReactorBase > >	m_nodes
	Pair of reactors forming end points of the connector.

string	m_name
	ConnectorNode name.

bool	m_defaultNameSet = false
	`true` if default name has been previously set.

Member Function Documentation

◆ type()

string type ( ) const

inlineoverridevirtual

String indicating the connector implemented.

Usually corresponds to the name of the derived class.

Reimplemented from FlowDevice.

Definition at line 90 of file flowControllers.h.

◆ ready()

bool ready ( )

inlineoverridevirtual

Reimplemented from FlowDevice.

Definition at line 94 of file flowControllers.h.

◆ setPrimary() [1/2]

void setPrimary ( shared_ptr< ConnectorNode > primary )

overridevirtual

Set the primary mass flow controller.

Since: New in Cantera 3.2.

Reimplemented from FlowDevice.

Definition at line 52 of file flowControllers.cpp.

◆ setPrimary() [2/2]

void setPrimary ( FlowDevice * primary )

inline

Set the primary mass flow controller.

Since: New in Cantera 3.0.

Deprecated:: To be removed after Cantera 3.2. Replaceable by version using shared pointer.

Definition at line 104 of file flowControllers.h.

◆ setTimeFunction() [1/2]

void setTimeFunction ( Func1 * g )

inlineoverridevirtual

Set a function of time that is used in determining the mass flow rate through the device.

The evaluation of mass flow depends on the derived flow device class.

Deprecated:: To be removed after Cantera 3.2. Replaceable by version using shared pointer.

Reimplemented from FlowDevice.

Definition at line 111 of file flowControllers.h.

◆ setTimeFunction() [2/2]

void setTimeFunction ( shared_ptr< Func1 > g )

inlineoverridevirtual

Set a function of time to modulate the mass flow rate.

Set a function of time that is used in determining the mass flow rate through the device. The evaluation of mass flow depends on the derived flow device class.

Since: Changed in Cantera 3.2. Previous version used a raw pointer.

Reimplemented from FlowDevice.

Definition at line 115 of file flowControllers.h.

◆ setPressureCoeff()

void setPressureCoeff ( double c )

inline

Set the proportionality constant between pressure drop and mass flow rate.

Definition at line 120 of file flowControllers.h.

◆ getPressureCoeff()

double getPressureCoeff ( )

inline

Get the pressure coefficient.

Definition at line 125 of file flowControllers.h.

◆ updateMassFlowRate()

void updateMassFlowRate ( double time )

overridevirtual

Update the mass flow rate at time 'time'.

This must be overloaded in derived classes to update m_mdot.

Reimplemented from FlowDevice.

Definition at line 34 of file flowControllers.cpp.

◆ FlowDevice()

FlowDevice	(	shared_ptr< ReactorBase >	r0,
		shared_ptr< ReactorBase >	r1,
		const string &	name = `"(none)"`
	)

Definition at line 27 of file FlowDevice.cpp.

Member Data Documentation

◆ m_primary

FlowDevice* m_primary = nullptr

protected

Definition at line 132 of file flowControllers.h.

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

Detailed Description

Public Member Functions

Protected Attributes

Member Function Documentation

◆ type()

◆ ready()

◆ setPrimary() [1/2]

◆ setPrimary() [2/2]

◆ setTimeFunction() [1/2]

◆ setTimeFunction() [2/2]

◆ setPressureCoeff()

◆ getPressureCoeff()

◆ updateMassFlowRate()

◆ FlowDevice()

Member Data Documentation

◆ m_primary