Fluid-fluid phase separation in hard spheres with a bimodal size distribution

Details Fluid-fluid phase separation in hard spheres with a bimodal size distribution Fluid-fluid phase separation in hard spheres with a bimodal size distribution

1998-07-08

arxiv.org/abs/cond-mat/9807117v2

Europhyics Letters, v.46, p.295, 1999.

Physics

Condensed Matter

Statistical Mechanics

7 pages, 3 figures, moderately REVISED following referees' comments (original was 4 pages, 3 postscript figures)

Scientific paper

10.1209/epl/i1999-00259-y

The effect of polydispersity on the phase behaviour of hard spheres is examined using a moment projection method. It is found that the Boublik-Mansoori-Carnahan-Starling-Leland equation of state shows a spinodal instability for a bimodal distribution if the large spheres are sufficiently polydisperse, and if there is sufficient disparity in mean size between the small and large spheres. The spinodal instability direction points to the appearance of a very dense phase of large spheres.

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