Description of concentration fluctuations in liquid binary mixtures with nonadditive potentials

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Abstract

The segregation or phase separation in a binary mixture is investigated within a quasilattice model and the hard-sphere-like model. The hard-sphere results are improved by incorporating a nonadditive attractive tail interaction. An analytic expression for the concentration fluctuation Scc(0) is obtained for the Lennard-Jones system and its equivalence to the lattice-based model is established. The results suggest that the segregation or phase separation, with either model, is an outcome of the energetic effect.

Original languageEnglish
Pages (from-to)332-338
Number of pages7
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume51
Issue number1
DOIs
Publication statusPublished - 1995

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Binary Mixtures
binary mixtures
Liquid
Fluctuations
Phase Separation
Hard Spheres
Segregation
liquids
Lennard-Jones
Model
equivalence
Tail
Equivalence
Interaction
interactions

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics

Cite this

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abstract = "The segregation or phase separation in a binary mixture is investigated within a quasilattice model and the hard-sphere-like model. The hard-sphere results are improved by incorporating a nonadditive attractive tail interaction. An analytic expression for the concentration fluctuation Scc(0) is obtained for the Lennard-Jones system and its equivalence to the lattice-based model is established. The results suggest that the segregation or phase separation, with either model, is an outcome of the energetic effect.",
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AB - The segregation or phase separation in a binary mixture is investigated within a quasilattice model and the hard-sphere-like model. The hard-sphere results are improved by incorporating a nonadditive attractive tail interaction. An analytic expression for the concentration fluctuation Scc(0) is obtained for the Lennard-Jones system and its equivalence to the lattice-based model is established. The results suggest that the segregation or phase separation, with either model, is an outcome of the energetic effect.

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