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Electrohydrodynamics of Drops and Vesicles

Authors
  • Vlahovska, Petia M.
Type
Published Article
Journal
Annual Review of Fluid Mechanics
Publisher
Annual Reviews
Publication Date
Jan 05, 2019
Volume
51
Pages
305–330
Identifiers
DOI: 10.1146/annurev-fluid-122316-050120
Source
Annual Reviews
Keywords
License
Yellow

Abstract

The 1969 review by J.R. Melcher and G.I. Taylor defined the field of electrohydrodynamics. Fifty years on, the interaction of weakly conducting (leaky dielectric) fluids with electric fields continues to yield intriguing phenomena. The prototypical system of a drop in a uniform electric field has revealed remarkable dynamics in strong electric fields such as symmetry-breaking instabilities (e.g., Quincke rotation) and streaming from the drop equator. This review summarizes recent experimental and theoretical studies in the area of fluid particles (drop and vesicles) in electric fields, with a focus on the transient dynamics and extreme deformations. A theoretical framework to treat the time evolution of nearly spherical shapes is provided. The model has been successful in describing the dynamics of vesicles (closed lipid membranes) in an electric field, highlighting the broader range of applicability of the leaky dielectric approach.

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