Critical parameters of hard-core Yukawa fluids within the structural theory

M. Bahaa Khedr, S. M. Osman*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A purely statistical mechanical approach is proposed to account for the liquid-vapor critical point based on the mean density approximation (MDA) of the direct correlation function. The application to hard-core Yukawa (HCY) fluids facilitates the use of the series mean spherical approximation (SMSA). The location of the critical parameters for HCY fluid with variable intermolecular range is accurately calculated. Good agreement is observed with computer simulation results and with the inverse temperature expansion (ITE) predictions. The influence of the potential range on the critical parameters is demonstrated and the universality of the critical compressibility ratio is discussed. The behavior of the isochoric and isobaric heat capacities along the equilibrium line and the near vicinity of the critical point is discussed in details.

Original languageEnglish
Pages (from-to)4427-4441
Number of pages15
JournalPhysica A: Statistical Mechanics and its Applications
Volume391
Issue number19
DOIs
Publication statusPublished - Oct 1 2012

Keywords

  • Critical parameters
  • Statistical theory of critical point
  • Theory of fluids

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistics and Probability

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