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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Inertia drives concentration-wave turbulence in sw
 immer suspensions - Prasad Perlekar (Tata Institut
 e of Fundamental Research)
DTSTART;TZID=Europe/London:20240612T140000
DTEND;TZID=Europe/London:20240612T145000
UID:TALK214696AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/214696
DESCRIPTION:Co-Authors: Purnima Jain\, Navdeep Rana\, Sriram R
 amaswamy\n&nbsp\;\nAbstract:\nWe discover an insta
 bility mechanism in suspensions of self-propelled 
 particles that does not involve active stress. Ins
 tead\, it is driven by a subtle interplay of inert
 ia\, swimmer motility\, and concentration fluctuat
 ions\, through a crucial time lag between the velo
 city and the concentration field. The resulting ti
 me-persistent state seen in our high-resolution nu
 merical simulations consists of self-sustained wav
 es of concentration and orientation\, transiting f
 rom regular oscillations to wave turbulence. We an
 alyze the statistical features of this active turb
 ulence\, including an intriguing connection to the
  Batchelor spectrum of passive scalars.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:
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