ApproxMixTransport Class Reference

Mixture-averaged transport properties based on major species composition. More...

#include <chemistry0d.h>

Inheritance diagram for ApproxMixTransport:

Public Member Functions
	ApproxMixTransport ()
void	setThreshold (double threshold)
	Set the mole fraction threshold below which species are not included in transport property calculations.
double	viscosity ()
void	getMixDiffCoeffs (double *const d)
void	getMixDiffCoeffsMass (double *const d)
void	getMixDiffCoeffsMole (double *const d)

Private Member Functions
void	updateViscosity_T ()
void	updateDiff_T ()
void	update_C ()

Private Attributes
double	_threshold
vector< size_t >	_kMajor
	indices of the species where X[k] >= threshold

Detailed Description

Mixture-averaged transport properties based on major species composition.

For a mixture containing N species, the standard formulas for computing the mixture-averaged viscosity and diffusion coefficients are \( O(N^2) \).

Species present in small concentrations contribute very little to the mixture viscosity and the diffusion coefficients of other species, so they can be excluded from the formulas without introducing significant errors. If there are M species with mole fractions above the specified threshold, (M < N) then excluding the contribution of the minor species reduces the computational cost of evaluating the viscosity to \( O(M^2) \) and the cost of evaluating the N diffusion coefficients to \( O(M N) \).

Constructor & Destructor Documentation

ApproxMixTransport()

ApproxMixTransport::ApproxMixTransport

(

)

Member Function Documentation

setThreshold()

void ApproxMixTransport::setThreshold

(

double

threshold

)

Set the mole fraction threshold below which species are not included in transport property calculations.

viscosity()

double ApproxMixTransport::viscosity

(

)

getMixDiffCoeffs()

void ApproxMixTransport::getMixDiffCoeffs

(

double *const

d

)

getMixDiffCoeffsMass()

void ApproxMixTransport::getMixDiffCoeffsMass

(

double *const

d

)

getMixDiffCoeffsMole()

void ApproxMixTransport::getMixDiffCoeffsMole

(

double *const

d

)

updateViscosity_T()

void ApproxMixTransport::updateViscosity_T ( )

private

updateDiff_T()

void ApproxMixTransport::updateDiff_T ( )

private

update_C()

void ApproxMixTransport::update_C ( )

private

Member Data Documentation

_threshold

double ApproxMixTransport::_threshold

private

_kMajor

vector<size_t> ApproxMixTransport::_kMajor

private

indices of the species where X[k] >= threshold

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

• src/chemistry0d.h
• src/chemistry0d.cpp