Recent developments in microfluidics and analytical chemistry have spurred renewed interest in electrokinetic manipulation of colloidal particles. In this work we investigate the dynamics of a suspension of conducting rods in an applied electric field, in the limit thin electrical double layers. The theory by Bazant and Squires for induced-charge electroosmosis [1, 2] is extended to high-aspect ratio particles to derive a simple model for the induced flow on the particle surfaces. Simulations are performed that include multi-body hydrodynamic interactions, and results are reported for orientation distributions and pair distribution functions. In particular, the pair distribution functions indicate that particle pairing occurs in the suspension as a result of the induced electroosmotic flow. A simple two-particle analytical model is derived for the pairing.
Induced-Charge Electrophoresis in Suspensions of Rodlike Particles: Theory and Simulations
- Views Icon Views
- Share Icon Share
- Search Site
Saintillan, D, Darve, E, & Shaqfeh, ESG. "Induced-Charge Electrophoresis in Suspensions of Rodlike Particles: Theory and Simulations." Proceedings of the ASME 2005 International Mechanical Engineering Congress and Exposition. Fluids Engineering. Orlando, Florida, USA. November 5–11, 2005. pp. 251-256. ASME. https://doi.org/10.1115/IMECE2005-80104
Download citation file: