Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session D07: Electrokinetics: General
2:30 PM–4:40 PM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B212
Chair: William Ristenpart, University of California, Davis
Abstract ID: BAPS.2018.DFD.D07.3
Abstract: D07.00003 : Electrohydrodynamic Flow induced by the Onsager Effect
2:56 PM–3:09 PM
Presenter:
Jung Min Oh
(Center for Soft and Living Matter, Institute for Basic Science, Ulsan 44919, Rep. of Korea)
Author:
Jung Min Oh
(Center for Soft and Living Matter, Institute for Basic Science, Ulsan 44919, Rep. of Korea)
We analyze the electrohydrodynamic flow around a cylindrical/spherical particle in a leaky dielectric medium induced by the Onsager effect, which describes the electric-field-dependent ion dissociation rate of weak electrolytes. From the Onsager effect, the conductivity is shown to increase linearly with respect to the electric field strength and the Coulombic force by the Maxwell-Wagner polarization can be induced in non-uniform electric field. In this paper, the time-averaged Stokes flow around a cylindrical/spherical particle by the Onsager effect is solved analytically using the perturbation expansion to the 1st order accuracy. The flow field solutions are expressed with a finite set of eigenfunctions in cylindrical and spherical coordinates. The flow velocity is proportional to the cubic of the electric field strength. It is also shown that the flow patterns can be classified by a simple straining, intermediate and eight-folded octagonal flow according to the Clausius-Mossoti factor, which is a function of complex conductivities of liquid and particle. The results are compared with full numerical simulations and experiments to discuss the detailed mechanism of flow structures.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.D07.3
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700