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SUMMARY:Hydrodynamic Hamiltonians of active two-dimensional fluids - Naomi
  Oppenheimer\, Tel Aviv University
DTSTART:20241203T130000Z
DTEND:20241203T140000Z
UID:TALK220441@talks.cam.ac.uk
CONTACT:Balázs Németh
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 
 into a hexagonal lattice\, whereas the micro-swimmers evolve into a zig-za
 g configuration with a particular tilt. While the two systems differ both 
 on the microscopic\, local interaction\, as well as the emerging\, global 
 structure\, 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\, 
 leading to different and surprising steady-state configurations.
LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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