Issue
EPL
Volume 84, Number 2, October 2008
Article Number 26001
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
DOI http://dx.doi.org/10.1209/0295-5075/84/26001
Published online 18 September 2008
EPL, 84 (2008) 26001
DOI: 10.1209/0295-5075/84/26001

Liquid-vapour coexistence in the dipolar Yukawa hard-sphere fluid

Yu. V. Kalyuzhnyi1, I. A. Protsykevytch1, G. Ganzenmüller2 and P. J. Camp2

1   Institute for Condensed Matter Physics - Svientsitskoho 1, 79011 Lviv, Ukraine
2   School of Chemistry, University of Edinburgh - West Mains Road, Edinburgh EH9 3JJ, UK, EU

yukal@icmp.lviv.ua

received 15 August 2008; accepted in final form 5 September 2008; published October 2008
published online 18 September 2008

Abstract
Thermodynamic perturbation theory for central-force associating potentials and Monte Carlo simulations are used to study the phase behaviour of the dipolar Yukawa hard-sphere fluid over a wide range of the particle dipole moment, $\mu $. Liquid-vapour coexistence is found to exist for values of $\mu $ far in excess of a “threshold” value found in earlier simulation studies. The predictions of the present theory are found to be in reasonably good agreement with computer simulation results, all the way up to the highest dipole moment studied.

PACS
64.10.+h - General theory of equations of state and phase equilibria.
64.70.F- - Liquid-vapor transitions.
82.70.Dd - Colloids.

© EPLA 2008