Title

Thermodynamic model of electric-field-induced pattern formation in binary dielectric fluids

Authors

Authors

M. D. Johnson; X. Duan; B. Riley; A. Bhattacharya;W. Luo

Comments

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Abbreviated Journal Title

Phys. Rev. E

Keywords

SPINODAL DECOMPOSITION; PHASE-SEPARATION; EQUILIBRIUM; SYSTEMS; Physics, Fluids & Plasmas; Physics, Mathematical

Abstract

An electric-field-induced phase transition and pattern formation in a binary dielectric fluid layer are studied using a coarse-grained free-energy functional. The electrostatic part of the free energy is a nonlinear functional of the dielectric function, which depends in turn on the local colloidal concentration. We determine the phase coexistence curve and find that beyond a critical electric field the system phase separates. Accompanying the phase separation are patterns similar to those observed in a spinodal decomposition of an ordinary binary fluid. The temporal evolution of the phase separating patterns are discussed both analytically and numerically by integrating a Cahn-Hilliard type of equation.

Journal Title

Physical Review E

Volume

69

Issue/Number

4

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

7

WOS Identifier

WOS:000221252100020

ISSN

1539-3755

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