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Issue 32, 2019
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Quincke rotor dynamics in confinement: rolling and hovering

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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.

Graphical abstract: Quincke rotor dynamics in confinement: rolling and hovering

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Publication details

The article was received on 10 Jun 2019, accepted on 17 Jul 2019 and first published on 23 Jul 2019


Article type: Paper
DOI: 10.1039/C9SM01163C
Soft Matter, 2019,15, 6564-6570

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    Quincke rotor dynamics in confinement: rolling and hovering

    G. E. Pradillo, H. Karani and P. M. Vlahovska, Soft Matter, 2019, 15, 6564
    DOI: 10.1039/C9SM01163C

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