Title

Mutual Diffusion in a Liquid Mixture of Argon and Krypton

Document Type

Article

Publication Date

12-15-1997

Department

Physics and Astronomy

Abstract

Molecular dynamics simulations are performed for an equimolar mixture of argon and krypton. The concentration-fluctuation autocorrelation functions F-m, the collective and individual velocity autocorrelation functions Z(m) and Z(s), and the mean-square displacements are measured. The mutual diffusion coefficient determined from F-m is less than measured previously, but this is due to the approximation Q = 1 in the previous measurements for the thermodynamic factor Q which we find less than unity. We also note that Z(s) exhibits an interesting temperature-dependent late-time behavior which arises from the back scattering effect.

Publication Title

Physica A: Statistical Mechanics and its Applications

Volume

247

Issue

1-4

First Page

140

Last Page

152