Oscillatory Electrohydrodynamic Gas Flows

[+] Author and Article Information
F. C. Lai

School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019

P. J. McKinney, J. H. Davidson

Particle Technology Laboratory, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455

J. Fluids Eng 117(3), 491-497 (Sep 01, 1995) (7 pages) doi:10.1115/1.2817289 History: Received February 05, 1994; Revised September 07, 1994; Online December 04, 2007


Prior numerical solutions of electrohydrodynamic flows in a positive-corona, wire-plate electrostatic precipitator are extended to reveal steady-periodic electrohydrodynamic flows. Previously, only steady solutions were reported. The present study includes results for flows with Reynolds numbers from 0 to 4800 and with dimensionless electric number ranging from 0.06 to ∞. Results indicate that two regimes of low frequency oscillatory flow occur. The first regime is characterized by a single recirculating vortex that oscillates in strength between one and five Hertz. The second regime is characterized by two counter-rotating vortices that oscillate in strength at a frequency near one Hertz.

Copyright © 1995 by The American Society of Mechanical Engineers
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