ConvectionSystemUTW Class Reference

System representing the coupled convection equations for U, T, and Wmx. More...

#include <convectionSystem.h>

Inheritance diagram for ConvectionSystemUTW:

Public Member Functions
	ConvectionSystemUTW ()
int	f (const realtype t, const sdVector &y, sdVector &ydot)
	The ODE function: ydot = f(t,y)
void	unroll_y (const sdVector &y)
	Use the contents of y to fill in the current state variables.
void	roll_y (sdVector &y) const
	Fill in y with the current values of the state variables.
void	roll_ydot (sdVector &ydot) const
	Fill in ydot with the current time derivatives.
void	resize (const size_t nPoints)
	Set the size of the domain to nPoints
void	resetSplitConstants ()
	Set the term in each equation representing contributions from diffusion or production terms to zero.
void	updateContinuityBoundaryCondition (const dvec &qdot, ContinuityBoundaryCondition::BC newBC)
	Determine the index of the grid point at which to impose the boundary condition for the continuity equation, jContBC, based on the boundary condition type and the current mass flux V.
void	setStrainFunction (ScalarFunction *f)
	Set the function used to compute the strain rate as a function of time.
void	setRhou (double _rhou)
Public Member Functions inherited from sdODE
virtual int	f (const realtype t, const sdVector &y, sdVector &ydot)=0
	Evaluate the ODE function.
virtual int	g (realtype t, sdVector &y, realtype *gOut)
	Optional function for CVODE to find roots of.
virtual int	denseJacobian (const realtype t, const sdVector &y, const sdVector &ydot, sdMatrix &J)
	Optional function used to compute the dense Jacobian.
virtual int	bandedJacobian (const realtype t, const sdVector &y, const sdVector &ydot, sdBandMatrix &J)
	Optional function used to compute a banded Jacobian.
virtual	~sdODE ()
Public Member Functions inherited from GridBased
	GridBased ()
virtual	~GridBased ()
virtual void	setGrid (const OneDimGrid &grid)
	Copy the specified grid to this object.

Public Attributes
dvec	U
	Tangential velocity gradient [1/s].
dvec	dUdt
	Time derivative of U, [1/s^2].
dvec	T
	Temperature [K].
dvec	dTdt
	Time derivative of T [K/s].
dvec	Wmx
	Mixture molecular weight [kg/kmol].
dvec	dWdt
	Time derivative of Wmx.
double	Tleft
	Temperature left boundary value.
double	Wleft
	mixture molecular weight left boundary value
double	rVzero
	mass flux boundary value at j=0
dvec	drhodt
	Time derivative of the density [kg/m^3*s].
dvec	splitConstT
	Constant in T equation introduced by splitting method.
dvec	splitConstW
	Constant in Wmx equation introduced by splitting method.
dvec	splitConstU
	Constant in U equation introduced by splitting method.
CanteraGas *	gas
	Cantera data.
dvec	V
	mass flux [kg/m^2*s]
dvec	rV
	(radial) mass flux (r*V) [kg/m^2*s or kg/m*rad*s]
dvec	rho
	mixture density [kg/m^3]
dvec	dUdx
	Gradient of U normal to the flame.
dvec	dTdx
	Gradient of T normal to the flame.
dvec	dWdx
	Gradient of Wmx normal to the flame.
ContinuityBoundaryCondition::BC	continuityBC
	The method used for determining the continuity boundary condition.
size_t	jContBC
	The point at which the continuity equation BC is applied.
double	xVzero
	Location of the stagnation point (if using fixedZero BC)
ScalarFunction *	strainFunction
	An object that provides the strain rate and its time derivative.
double	rhou
	Set the density of the unburned mixture.
Public Attributes inherited from GridBased
OneDimGrid	grid
	the actual grid

Private Member Functions
void	V2rV ()
	compute rV from V
void	rV2V ()
	compute V from rV

Private Attributes
size_t	nVars
	Number of state variables at each grid point (== 3)

Additional Inherited Members
Protected Attributes inherited from GridBased
dvec &	x
	The coordinates of the grid points [m].
dvec &	r
	"radius" at x[j].
dvec &	rphalf
	"radius" at x[j+1/2].
dvec &	hh
	Grid spacing between x[j] and x[j+1].
dvec &	dlj
	Average of left and right grid spacing.
dvec &	cfm
	Coefficient for y[j-1] in first centered difference.
dvec &	cf
	Coefficient for y[j] in first centered difference.
dvec &	cfp
	Coefficient for y[j+1] in first centered difference.
int &	alpha
	curved grid exponent.
int &	beta
	curved grid exponent.
size_t &	nPoints
	number of grid point
size_t &	jj
	index of last grid point (== nPoints-1)

Detailed Description

System representing the coupled convection equations for U, T, and Wmx.

Solves equations for the tangential velocity gradient U, the temperature T and the mixture molecular weight Wmx which are coupled with the continuity equation.

Constructor & Destructor Documentation

ConvectionSystemUTW()

ConvectionSystemUTW::ConvectionSystemUTW

(

)

Member Function Documentation

f()

int ConvectionSystemUTW::f ( const realtype  t, const sdVector &  y, sdVector &  ydot  )

virtual

The ODE function: ydot = f(t,y)

Implements sdODE.

unroll_y()

void ConvectionSystemUTW::unroll_y

(

const sdVector &

y

)

Use the contents of y to fill in the current state variables.

roll_y()

void ConvectionSystemUTW::roll_y

(

sdVector &

y

)

const

Fill in y with the current values of the state variables.

roll_ydot()

void ConvectionSystemUTW::roll_ydot

(

sdVector &

ydot

)

const

Fill in ydot with the current time derivatives.

resize()

void ConvectionSystemUTW::resize

(

const size_t

nPoints

)

Set the size of the domain to nPoints

resetSplitConstants()

void ConvectionSystemUTW::resetSplitConstants

(

)

Set the term in each equation representing contributions from diffusion or production terms to zero.

updateContinuityBoundaryCondition()

void ConvectionSystemUTW::updateContinuityBoundaryCondition	(	const dvec &	qdot,
		ContinuityBoundaryCondition::BC	newBC
	)

Determine the index of the grid point at which to impose the boundary condition for the continuity equation, jContBC, based on the boundary condition type and the current mass flux V.

setStrainFunction()

void ConvectionSystemUTW::setStrainFunction ( ScalarFunction *  f )

inline

Set the function used to compute the strain rate as a function of time.

setRhou()

void ConvectionSystemUTW::setRhou ( double  _rhou )

inline

V2rV()

void ConvectionSystemUTW::V2rV ( void  )

private

compute rV from V

rV2V()

void ConvectionSystemUTW::rV2V ( void  )

private

compute V from rV

Member Data Documentation

U

dvec ConvectionSystemUTW::U

Tangential velocity gradient [1/s].

State variable.

dUdt

dvec ConvectionSystemUTW::dUdt

Time derivative of U, [1/s^2].

T

dvec ConvectionSystemUTW::T

Temperature [K].

State variable.

dTdt

dvec ConvectionSystemUTW::dTdt

Time derivative of T [K/s].

Wmx

dvec ConvectionSystemUTW::Wmx

Mixture molecular weight [kg/kmol].

State variable.

dWdt

dvec ConvectionSystemUTW::dWdt

Time derivative of Wmx.

Tleft

double ConvectionSystemUTW::Tleft

Temperature left boundary value.

Wleft

double ConvectionSystemUTW::Wleft

mixture molecular weight left boundary value

rVzero

double ConvectionSystemUTW::rVzero

mass flux boundary value at j=0

drhodt

dvec ConvectionSystemUTW::drhodt

Time derivative of the density [kg/m^3*s].

splitConstT

dvec ConvectionSystemUTW::splitConstT

Constant in T equation introduced by splitting method.

splitConstW

dvec ConvectionSystemUTW::splitConstW

Constant in Wmx equation introduced by splitting method.

splitConstU

dvec ConvectionSystemUTW::splitConstU

Constant in U equation introduced by splitting method.

gas

CanteraGas* ConvectionSystemUTW::gas

Cantera data.

V

dvec ConvectionSystemUTW::V

mass flux [kg/m^2*s]

rV

dvec ConvectionSystemUTW::rV

(radial) mass flux (r*V) [kg/m^2*s or kg/m*rad*s]

rho

dvec ConvectionSystemUTW::rho

mixture density [kg/m^3]

dUdx

dvec ConvectionSystemUTW::dUdx

Gradient of U normal to the flame.

dTdx

dvec ConvectionSystemUTW::dTdx

Gradient of T normal to the flame.

dWdx

dvec ConvectionSystemUTW::dWdx

Gradient of Wmx normal to the flame.

continuityBC

ContinuityBoundaryCondition::BC ConvectionSystemUTW::continuityBC

The method used for determining the continuity boundary condition.

jContBC

size_t ConvectionSystemUTW::jContBC

The point at which the continuity equation BC is applied.

xVzero

double ConvectionSystemUTW::xVzero

Location of the stagnation point (if using fixedZero BC)

strainFunction

ScalarFunction* ConvectionSystemUTW::strainFunction

An object that provides the strain rate and its time derivative.

rhou

double ConvectionSystemUTW::rhou

Set the density of the unburned mixture.

This value appears in the source term of the momentum equation. density of the unburned gas

nVars

size_t ConvectionSystemUTW::nVars

private

Number of state variables at each grid point (== 3)

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

• src/convectionSystem.h
• src/convectionSystem.cpp