Liquid-vapour phase behaviour of a symmetrical binary fluid mixture

Details Liquid-vapour phase behaviour of a symmetrical binary fluid mixture Liquid-vapour phase behaviour of a symmetrical binary fluid mixture

1998-01-26

arxiv.org/abs/cond-mat/9801265v1

Physics

Condensed Matter

Statistical Mechanics

Revtex, 8 figures

Scientific paper

10.1103/PhysRevE.58.2201

Using Monte-Carlo simulation and mean field calculations, we study the liquid-vapour phase diagram of a square well binary fluid mixture as a function of a parameter $\delta$ measuring the relative strength of interactions between particles of dissimilar and similar species. The results reveal a rich variety of liquid-vapour coexistence behaviour as $\delta$ is tuned. Specifically, we uncover critical end point behaviour, a triple point involving a vapour and two liquids of different density, and tricritical behaviour. For a certain range of $\delta$, the mean field calculations also predict a `hidden' (metastable) liquid-vapour binodal.

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