Dynamic response of a thin sessile drop of conductive liquid to an abruptly applied or removed electric field

L. T. Corson, N. J. Mottram, B. R. Duffy, S. K. Wilson, C. Tsakonas, C. V. Brown

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Abstract

We consider, both theoretically and experimentally, a thin sessile drop of conductive liquid that rests on the lower plate of a parallel-plate capacitor. We derive analytical expressions for both the initial deformation and the relaxation dynamics of the drop as the electric field is either abruptly applied or abruptly removed, as functions of the geometrical, electrical and material parameters, and investigate the ranges of validity of these expressions by comparison with full numerical simulations. These expressions provide a reasonable description of the experimentally measured dynamic response of a drop of conductive ionic liquid 1-butyl-3-methyl imidazolium tetrafluoroborate.
Original languageEnglish
Article number043112
Number of pages13
JournalPhysical Review E
Volume94
DOIs
Publication statusPublished - 24 Oct 2016

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Keywords

  • parallel-plate capacitor
  • thin sessile drop
  • conductive liquid
  • relaxation dynamics
  • deformation
  • dynamic response
  • 1-butyl-3-methyl imidazolium tetrafluoroborate
  • DC voltage difference

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