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Free-volume approximations for predicting the phase behaviour of asymmetric hard-sphere mixtures

Henk N W Lekkerkerker1 and S Martijn Oversteegen

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Two different levels of the free-volume approximation for the calculation of the phase diagram of a asymmetric hard-sphere mixture are compared to direct simulations of the phase behaviour. The mean-field-level free-volume approach, where only the statistically pre-averaged free volume is accounted for, is already in satisfactory agreement with the simulation results. Taking correlations into account within the free-volume approach improves the agreement with the solid branch of the phase diagram but, remarkably, this version performs somewhat worse for the fluid branch.


PACS

61.20.Ja Computer simulation of liquid structure

82.70.Dd Colloids

82.70.Kj Emulsions and suspensions

Subjects

Soft matter, liquids and polymers

Chemical physics and physical chemistry

Dates

Issue 40 (14 October 2002)

Received 2 May 2002

Published 27 September 2002



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