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.
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ASME 2005 International Mechanical Engineering Congress and Exposition
November 5–11, 2005
Orlando, Florida, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4219-3
PROCEEDINGS PAPER
Induced-Charge Electrophoresis in Suspensions of Rodlike Particles: Theory and Simulations Available to Purchase
Eric S. G. Shaqfeh
Eric S. G. Shaqfeh
Stanford University
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David Saintillan
Stanford University
Eric Darve
Stanford University
Eric S. G. Shaqfeh
Stanford University
Paper No:
IMECE2005-80104, pp. 251-256; 6 pages
Published Online:
February 5, 2008
Citation
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
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