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The Effect of Electrostatic Forces on the Distribution of Drops in a Channel

[+] Author Affiliations
Arturo Fernández, Jiacai Lu, Asghar Esmaeeli, Grétar Tryggvason

Worcester Polytechnic Institute, Worcester, MA

Paper No. FEDSM2002-31237, pp. 531-536; 6 pages
doi:10.1115/FEDSM2002-31237
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

Direct numerical simulations are used to examine the effect of electric fields on the behavior of suspension of drops in dielectric fluids. The effect of electric field is modeled using the “leaky dielectric” model, coupled with the full Navier-Stokes equations. The governing equations are solved using a front-tracking/finite volume technique. The interaction of the drops is strongly dependant on the conductivity and the permittivity ratio, but fibration, where drops line up into long columns, takes place over a wide range of these parameters. The hydrodynamic interaction due to fluid circulation induced by the electric field has a strong influence on the drop distribution and the rate of fibration.

Copyright © 2002 by ASME

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