Phase separation in fluid additive hard sphere mixtures?

Douglas Henderson, D. Boda, Kwong Yu Chan, Darsh T. Wasan

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Some years ago Lebowitz and Rowlinson 'established' that phase separation did not occur in fluid mixtures of additive hard spheres. Their analysis was based on the thermodynamic functions of this mixture, obtained from the solution of the Percus-Yevick (PY) equation At the time, these results were thought to be accurate for all states for which additive hard sphere mixtures were fluid. Recent theoretical work and simulations have shown that the PY radial distribution function between a pair of large spheres is seriously in error when the ratio of the diameters of the large and small spheres becomes large and when the concentration of the large spheres is very small. Thus, a reexamination of the question of phase stability in fluid additive hard sphere mixtures is worthwhile. Indeed, it is found that phase separation is probable in fluid additive hard sphere mixtures when the concentration of the large particles is very dilute Generally, the coexisting phase is solid. However, under some circumstances the coexisting phase may be fluid. This result may provide insight into the recently observed phase separation in colloids.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalMolecular Physics
Volume95
Issue number2
Publication statusPublished - Oct 10 1998

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Colloids
Thermodynamics
Phase separation
Fluids
fluids
Phase stability
radial distribution
Distribution functions
colloids
solid phases
distribution functions
thermodynamics
simulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Henderson, D., Boda, D., Chan, K. Y., & Wasan, D. T. (1998). Phase separation in fluid additive hard sphere mixtures? Molecular Physics, 95(2), 131-135.

Phase separation in fluid additive hard sphere mixtures? / Henderson, Douglas; Boda, D.; Chan, Kwong Yu; Wasan, Darsh T.

In: Molecular Physics, Vol. 95, No. 2, 10.10.1998, p. 131-135.

Research output: Contribution to journalArticle

Henderson, D, Boda, D, Chan, KY & Wasan, DT 1998, 'Phase separation in fluid additive hard sphere mixtures?', Molecular Physics, vol. 95, no. 2, pp. 131-135.
Henderson D, Boda D, Chan KY, Wasan DT. Phase separation in fluid additive hard sphere mixtures? Molecular Physics. 1998 Oct 10;95(2):131-135.
Henderson, Douglas ; Boda, D. ; Chan, Kwong Yu ; Wasan, Darsh T. / Phase separation in fluid additive hard sphere mixtures?. In: Molecular Physics. 1998 ; Vol. 95, No. 2. pp. 131-135.
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