A Thermodynamic Model of Electric-Field-Induced Pattern Formation in Binary Dielectric Fluids
软凝聚态物质
2007-05-23 v1
摘要
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 co-existence 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.
引用
@article{arxiv.cond-mat/0211495,
title = {A Thermodynamic Model of Electric-Field-Induced Pattern Formation in Binary Dielectric Fluids},
author = {M. D. Johnson and X. Duan and Brett Riley and Aniket Bhattacharya and Weili Luo},
journal= {arXiv preprint arXiv:cond-mat/0211495},
year = {2007}
}
备注
16 pages including 5 figures