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SUMMARY:Chaotic tumbling and steady drifting of bananas in shear flow - Ia
 n Thorp (University of Cambridge)
DTSTART:20181025T120000Z
DTEND:20181025T130000Z
UID:TALK112936@talks.cam.ac.uk
CONTACT:Anne Herrmann
DESCRIPTION:The motion of an axisymmetric ellipsoid immersed in a shear fl
 ow at zero Reynolds number is simple: the ellipsoid rotates periodically a
 nd is advected downstream by the fluid. However\, bending the ellipsoid in
 to a banana shape radically changes both its rotational and translational 
 dynamics. The rotation becomes quasiperiodic or chaotic and particles can 
 drift steadily across the streamlines in the gradient and/or the vorticity
  directions of the shear flow. I shall explain the origins of drift and th
 e changes in rotational dynamics in terms of the symmetry group of the par
 ticle (shared by T-shapes and square pyramids) and the reversibility of St
 okes flow\, which establish a connection to KAM theory.\n
LOCATION:MR11\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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