Phase behaviour and separation kinetics of symmetric non-additive hard discs

Abstract

The phase separation of symmetric non-additive hard discs mixtures is studied. For that purpose, Monte Carlo simulations are implemented for accessing both phase separation behaviour and its kinetics. The latter is monitored by the evolution of the cluster size distribution of the less concentrated species. The kinetic data are then compared to the stochastic solutions of the master equation, which constitute a reduced description of the same phenomenon. The obtained good agreement points out the success of this simple numerical method for correctly describing the reversible nature of the drop-like clusters.

Keywords:

• kinetics
• liquid phase separation
• non-additivity

Acknowledgements

This work is dedicated to the memory of our colleague and friend Yurko Duda. L.M.S. acknowledges the scholarship granted by the IMP and the CONACyT, through numbers 3588 and 85014, respectively.