getMixtureLambda

Chemical Reactor Design Toolbox Reference Manual

ChemReactorDesign.Basic.Liquid.Functions.getMixtureLambda

The heat conductivity of the gas mixture is calculated according to the Wassiljevailke equation (Jürgen Gmehling and Michael Kleiber and Bärbel Kolbe and Jürgen Rarey, 2019, p.123).

$\begin{equation*} {\overline \lambda} = \sum_{i}^{N} \sum_{j}^{N} \frac{2 \, \Phi_{i} \, \Phi_{j}}{\frac{1}{\lambda_{i}}+\frac{1}{\lambda_{j}}} \end{equation*}$

with

$\begin{equation*} \Phi_{ij} = \frac{x_{i} \, {\overline V}_{i}} {\sum\limits_{j}^{N} x_{j} \, {\overline V}_{j}} \end{equation*}$

Nomenclature

$M_{i}$	molar mass of species A_i
$\mu_{i}$	viscosity of species A_i
$\lambda_i$	heat conductivity of species A_i
$x_{i}$	mole fraction of species A_i

Bibliography

Jürgen Gmehling and Michael Kleiber and Bärbel Kolbe and Jürgen Rarey (2019). Chemical Thermodynamics for Process Simulation, Wiley-VCH.