Phase behaviour of a two-dimensional Lennard-Jones binary mixture Part II. Type III to Type I transition

Abstract

Calculations are presented on the phase behaviour of quasi-two-dimensional Lennard-Jones fluid binary mixtures. The results obtained show a Type III phase equilibria diagram similar to that observed in three-dimensional binary mixtures. A transition is found from a Type III to a Type I phase equilibria diagram. The study uses a mean field theory similar to that applied to a binary mixture of hard spheres with immersed point dipoles that showed that the transition was from Type III to Type IV instead. Consequently we suggest that, within mean field theories, a Type IV phase diagram is only obtained if the interactions are angle-dependent.