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SUMMARY:Hydrodynamic Hamiltonians of active two-dimensional fluids - Naomi
  Oppenheimer (Tel Aviv University)
DTSTART:20250220T130000Z
DTEND:20250220T140000Z
UID:TALK226279@talks.cam.ac.uk
CONTACT:Anand Srinivasan
DESCRIPTION:I will describe two biologically inspired systems that can be 
 analyzed using the same hydrodynamic Hamiltonian formalism. The first is A
 TP synthase proteins\, which rotate in a biological membrane. The second i
 s swimming micro-organisms such as bacteria or algae confined to a two-dim
 ensional film. I will show that in both cases\, the active systems self-as
 semble into distinct structural states—the rotating proteins rearrange i
 nto a hexagonal lattice\, whereas the micro-swimmers evolve into a zig-zag
  configuration with a particular tilt. While the two systems differ both o
 n the microscopic\, local interaction\, as well as the emerging\, global s
 tructure\, their dynamics originate from similar geometrical conservation 
 laws applicable to a broad class of fluid flows. Time permitting\, I will 
 show experiments and simulations in which the Hamiltonian is perturbed\, l
 eading to different and surprising steady-state configurations.
LOCATION:MR14\,  Centre for Mathematical Sciences\, Wilberforce Road\, Cam
 bridge
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