Universal scaling laws of diffusion in a binary fluid mixture

Samanta, Alok ; Ali, Sk. Musharaf ; Ghosh, Swapan K. (2001) Universal scaling laws of diffusion in a binary fluid mixture Physical Review Letters, 87 (24). 245901_1-245901_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v87/i24/e245901

Related URL: http://dx.doi.org/10.1103/PhysRevLett.87.245901


A new universal scaling law relating the self-diffusivities of a binary fluid mixture and the excess entropies of its components is derived using mode coupling theory, reproducing the empirical scaling laws of Dzugutov [Nature (London) 381, 137 (1996)] and Hoyt et al. [Phys. Rev. Lett. 85, 594 (2000)] as special cases. The derived scaling laws are tested through numerical calculations for binary Lennard-Jones fluid mixtures for a wide range of physical parameters, and a very good correlation is observed. We have also arrived at a new universal scaling relationship between the cross-diffusivity and entropy for the first time.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:11121
Deposited On:09 Nov 2010 03:56
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