Open AccessEquation of state of nonadditive d-dimensional hard-sphere mixtures
Author(s) -
Andrés Santos,
M. López de Haro,
S. B. Yuste
Publication year - 2004
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.1832591
Subject(s) - hard spheres , equation of state , compressibility , binary number , virial coefficient , extension (predicate logic) , compressibility factor , thermodynamics , virial theorem , statistical physics , simple (philosophy) , component (thermodynamics) , spheres , physics , mathematics , quantum mechanics , computer science , philosophy , arithmetic , epistemology , astronomy , galaxy , programming language
An equation of state for a multicomponent mixture of non-additive hardspheres in $d$ dimensions is proposed. It yields a rather simple densitydependence and constitutes a natural extension of the equation of state foradditive hard spheres proposed by us [A. Santos, S. B. Yuste, and M. L\'opez deHaro, Mol. Phys. 96, 1 (1999)]. The proposal relies on the known exact secondand third virial coefficients and requires as input the compressibility factorof the one-component system. A comparison is carried out both to another recenttheoretical proposal based on a similar philosophy and to the available exactresults and simulation data in $d=1$, 2, and 3. Good general agreement with thereported values of the virial coefficients and of the compressibility factor ofbinary mixtures is observed, especially for high asymmetries and/or positivenonadditivities.Comment: 18 pages, 12 figures; minor changes; to be published in JC
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