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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/16037

Title: Phase behavior of a fluid with competing attractive and repulsive interactions
Authors: Archer, Andrew J.
Wilding, Nigel B.
Issue Date: 2007
Publisher: © The American Physical Society
Citation: ARCHER, A.J. and WILDING, N.B., 2007. Phase behavior of a fluid with competing attractive and repulsive interactions. Physical Review E, 76 (3), 031501.
Abstract: Fluids in which the interparticle potential has a hard core, is attractive at moderate separations, and repulsive at large separations are known to exhibit unusal phase behavior, including stable inhomogeneous phases. Here we report a joint simulation and theoretical study of such a fluid, focusing on the relationship between the liquid-vapor transition line and any new phases. The phase diagram is studied as a function of the amplitude of the attraction for a certain fixed amplitude of the long ranged repulsion. We find that the effect of the repulsion is to substitute the liquid-vapor critical point and a portion of the associated liquid-vapor transition line, by two first-order transitions. One of these transitions separates the vapor from a fluid of spherical liquidlike clusters; the other separates the liquid from a fluid of spherical voids. At low temperature, the two transition lines intersect one another and a vapor-liquid transition line at a triple point. While most integral equation theories are unable to describe the new phase transitions, the Percus-Yevick approximation does succeed in capturing the vapor-cluster transition, as well as aspects of the structure of the cluster fluid, in reasonable agreement with the simulation results.
Description: This article was published in the journal, Physical Review E [© The American Physical Society].
Sponsor: A.J.A. gratefully acknowledges support from RCUK.
Version: Published
DOI: 10.1103/PhysRevE.76.031501
URI: https://dspace.lboro.ac.uk/2134/16037
Publisher Link: http://dx.doi.org/10.1103/PhysRevE.76.031501
ISSN: 1539-3755
Appears in Collections:Published Articles (Maths)

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