Cluster monte carlo study of multicomponent fluids of the stillinger-helfand and widom-rowlinson type
Phase transitions of fluid mixtures of the type introduced by Stillinger and Helfand are studied using a continuum version of the invaded cluster algorithm. Particles of the same species do not interact, but particles of different types interact with each other via a repulsive potential. Examples of interactions include the Gaussian molecule potential and a repulsive step potential. Accurate values of the critical density, fugacity, and magnetic exponent are found in two and three dimensions for the two-species model. The effect of varying the number of species and of introducing quenched impurities is also investigated. In all the cases studied, mixtures of q species are found to have properties similar to q-state Potts models.
Sun
R
Department of Physics, Clark University, Worcester, Massachusetts 01610-1477, USA.
Gould
H
Machta
J
Chayes
LW