Influence of static electric field on the vapour-liquid coexistence of dipolar soft-sphere fluids

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Abstract

The influence of a static homogeneous electric field on the vapour-liquid equilibrium of dipolar soft-sphere fluids has been studied by the Gubbins-Pople-Stell perturbation theory. The thermodynamic properties of the fluid as functions of the field strength were derived from the Helmholtz energy containing the field-dependent relative permittivity. The dielectric saturation was studied by a perturbation theoretical treatment of the Kirk-wood equation. Our calculations can yield a weak negative saturation. It was found that the critical quantities increase, while the temperature range of the phase coexistence narrows with the field strength. A comparison between our electrostriction results and simulation data shows reasonable agreement at low field strengths.

Original languageEnglish
Pages (from-to)889-894
Number of pages6
JournalJournal of the Chemical Society, Faraday Transactions
Volume91
Issue number5
DOIs
Publication statusPublished - Dec 1 1995

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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