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Concentration and mass dependence of transport coefficients and correlation functions in binary mixtures with high mass-asymmetry | | W. Fenz
; I. M. Mryglod
; O. Prytula
; R. Folk
; | | Date: |
15 Jun 2009 | | Abstract: | Correlation functions and transport coefficients of self-diffusion and shear
viscosity of a binary Lennard-Jones mixture with components differing only in
their particle mass are studied up to high values of the mass ratio $mu$,
including the limiting case $mu=infty$, for different mole fractions $x$.
Within a large range of $x$ and $mu$ the product of the diffusion coefficient
of the heavy species $D_{2}$ and the total shear viscosity of the mixture
$eta_{m}$ is found to remain constant, obeying a generalized Stokes-Einstein
relation. At high liquid density, large mass ratios lead to a pronounced cage
effect that is observable in the mean square displacement, the velocity
autocorrelation function and the van Hove correlation function. | | Source: | arXiv, 0906.2625 | | Services: | Forum | Review | PDF | Favorites | |
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