Quincke rotor dynamics in confinement: Rolling and hovering

Gerardo E. Pradillo, Hamid Karani, Petia M. Vlahovska*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The Quincke effect is an electrohydrodynamic instability which gives rise to a torque on a dielectric particle in a uniform DC electric field. Previous studies reported that a sphere initially resting on the electrode rolls with steady velocity. We experimentally find that in strong fields the rolling becomes unsteady, with time-periodic velocity. Furthermore, we find another regime, where the rotating sphere levitates in the space between the electrodes. Our experimental results show that the onset of Quincke rotation strongly depends on particle confinement and the threshold for rolling is higher compared to rotation in the hovering state.

Original languageEnglish (US)
Pages (from-to)6564-6570
Number of pages7
JournalSoft Matter
Volume15
Issue number32
DOIs
StatePublished - Jan 1 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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