Abstract
Insulating particles or drops suspended in carrier liquids may start to rotate with a constant frequency when subjected to a uniform DC electric field. This is known as the Quincke rotation electro-hydrodynamic instability. A single isolated rotating particle exhibit no translational motion at low Reynolds number, however interacting rotating particles may move relative to one another. Here we present a simple system consisting of two interacting and deformable Quincke rotating particle covered drops, i.e. deformable Pickering drops. The drops attract one another and spontaneously form a counter-rotating pair that exhibits electro-hydrodynamic driven propulsion at low Reynolds number flow.
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Dommersnes, P., Mikkelsen, A. & Fossum, J. Electro-hydrodynamic propulsion of counter-rotating Pickering drops. Eur. Phys. J. Spec. Top. 225, 699–706 (2016). https://doi.org/10.1140/epjst/e2016-60090-2
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DOI: https://doi.org/10.1140/epjst/e2016-60090-2