Direct Simulation of the Phase Behavior of Binary Hard-Sphere Mixtures: Test of the Depletion Potential Description
- 4 January 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 82 (1), 117-120
- https://doi.org/10.1103/physrevlett.82.117
Abstract
We study the phase behavior of additive binary hard-sphere mixtures by direct computer simulation, using a new technique which exploits an analog of the Gibbs adsorption equation. The resulting phase diagrams, for size ratios , and 0.05, are in remarkably good agreement with those obtained from an effective one-component Hamiltonian based on pairwise additive depletion potentials, even in regimes of high packing (solid phases) and for relatively large size ratios ( ) where one might expect the approximation of pairwise additivity to fail. Our results show that the depletion potential description accounts for the key features of the phase equilibria for .
Keywords
This publication has 25 references indexed in Scilit:
- Structure and phase diagram of mixtures of hard spheres in the limit of infinite size ratioThe Journal of Chemical Physics, 1998
- Long-time self-diffusion in binary colloidal hard-sphere dispersionsPhysical Review E, 1995
- Phase diagrams of nearly-hard-sphere binary colloidsPhysical Review E, 1995
- Experimental Phase Diagram of a Binary Colloidal Hard-Sphere Mixture with a Large Size RatioPhysical Review Letters, 1995
- Phase Behaviour of Hard-Sphere MixturesEurophysics Letters, 1994
- Direct Observation of the Entropic Potential in a Binary SuspensionPhysical Review Letters, 1994
- On the spinodal instability of highly asymmetric hard sphere suspensionsPhysica A: Statistical Mechanics and its Applications, 1993
- Phase separation of asymmetric binary hard-sphere fluidsPhysical Review Letters, 1991
- Polymers at Interfaces and the Interactions in Colloidal DispersionsPure and Applied Chemistry, 1976
- Thermodynamic Properties of Mixtures of Hard SpheresThe Journal of Chemical Physics, 1964