Species Transport Field Functions Reference

The following field functions are made available when a Multi-Component Material has been specified.

Effective Mass Diffusivity of Species	The effective mass diffusivity, $D_{\text{eff}}=D_m+{\mu }_t/\left({\rho \sigma }_t\right)$ , where $D_m$ is the molecular diffusivity, ${\mu }_t$ is the turbulent viscosity, and ${\sigma }_t$ is the turbulent Schmidt number. For laminar flows, ${\mu }_t=0$ , and $D_{\text{eff}}=D_m$ .
Mass Fraction of Species	The mass fraction, $Y_i={m_i/m}_m$ , of species i in mixture m.
Molar Concentration of Species	The molar concentration, $C_i={\rho }_m{Y}_i/W_i$ , of species i in a mixture m, where ${\rho }_m$ is the mixture density, $Y_i$ is the species mass fraction, and $W_i$ is the species molecular weight.
Mole Fraction of Species	The mole fraction, $X_i=Y_i{W}_m/W_i$ , of species i in a mixture m, where $Y_i$ is the species mass fraction, $W_m$ is the molecular weight of the mixture, and $W_i$ is the molecular weight of the species.