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SUMMARY:Active particles powered by Quincke rotation in a bulk fluid - Deb
 asish Das (University of Cambridge)
DTSTART:20181115T130000Z
DTEND:20181115T140000Z
UID:TALK114703@talks.cam.ac.uk
CONTACT:Anne Herrmann
DESCRIPTION:Dielectric particles suspended in a weakly conducting fluid ar
 e known to spontaneously start rotating under the action of a sufficiently
  strong uniform DC electric field due to the Quincke rotation instability.
  This rotation can be converted into translation when the particles are pl
 aced near a surface providing useful model systems for active matter. Usin
 g a combination of numerical simulations and theoretical models\, we demon
 strate that it is possible to convert the spontaneous Quincke rotation int
 o spontaneous translation even in the absence of surfaces by relying on ge
 ometrical asymmetry instead. Suspensions of randomly-shaped particles unde
 r Quincke rotation are thus expected to perform collective motion by explo
 ring the full three-dimensional space as the swimming direction is unspeci
 fied\, thereby\, opening doors to a potentially new type of active matter.
LOCATION:MR11\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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