Abstract
It was found that transport properties of gases (viscosity η, thermal conductivity λ, and diffusion coefficients D) in the form of the quantity: C=ηDλTα are temperature independent in the 700-2000 K temperature interval. Although the exponent α seems to be independent inside the group for all the monoatomic vapours it seems to change between different groups (α = 1.909 ± 0.015 for alkali metal vapours - Li, Na, K, Rb and Cs; α = 1.72 ± 0.05 for noble gases - He, Ne, Ar, Kr, and Xe). In this approach, transport properties of gases are correlated using only different values of C. This fact was extended to the properties of the binary mixtures of monoatomic and diatomic molecules in the alkali metal vapours, to obtain the mutual diffusion coefficients D 12(T, p) and the self-diffusion coefficients of diatomic molecules, D 22(T).
Original language | English |
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Pages (from-to) | 215-223 |
Number of pages | 9 |
Journal | Fluid Phase Equilibria |
Volume | 227 |
Issue number | 2 |
DOIs | |
State | Published - 25 Jan 2005 |
Keywords
- Alkali metal vapours
- Diffusion coefficients
- Dimerization
- Noble gases
- Thermal conductivity
- Viscosity
ASJC Scopus subject areas
- General Chemical Engineering
- General Physics and Astronomy
- Physical and Theoretical Chemistry