PhysRevE.76.031501.pdf (896.92 kB)
Download filePhase behavior of a fluid with competing attractive and repulsive interactions
journal contribution
posted on 2014-10-09, 13:41 authored by Andrew ArcherAndrew Archer, Nigel B. WildingFluids 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.
Funding
A.J.A. gratefully acknowledges support from RCUK.
History
School
- Science
Department
- Mathematical Sciences
Published in
PHYSICAL REVIEW EVolume
76Issue
3Pages
? - ? (14)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.Publisher
© The American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2007Notes
This article was published in the journal, Physical Review E [© The American Physical Society].ISSN
1539-3755Publisher version
Language
- en