BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Inertia drives concentration-wave turbulence in swimmer suspension
 s - Prasad Perlekar (Tata Institute of Fundamental Research)
DTSTART:20240612T130000Z
DTEND:20240612T135000Z
UID:TALK214696@talks.cam.ac.uk
DESCRIPTION:Co-Authors: Purnima Jain\, Navdeep Rana\, Sriram Ramaswamy\n&n
 bsp\;\nAbstract:\nWe discover an instability mechanism in suspensions of s
 elf-propelled particles that does not involve active stress. Instead\, it 
 is driven by a subtle interplay of inertia\, swimmer motility\, and concen
 tration fluctuations\, through a crucial time lag between the velocity and
  the concentration field. The resulting time-persistent state seen in our 
 high-resolution numerical simulations consists of self-sustained waves of 
 concentration and orientation\, transiting from regular oscillations to wa
 ve turbulence. We analyze the statistical features of this active turbulen
 ce\, including an intriguing connection to the Batchelor spectrum of passi
 ve scalars.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR