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SUMMARY:Flow interactions: From individual to collective aerodynamics - Ch
 ristiana Mavroyiakoumou (University of Oxford)
DTSTART:20260217T130000Z
DTEND:20260217T140000Z
UID:TALK243448@talks.cam.ac.uk
CONTACT:Balázs Németh
DESCRIPTION:I will discuss two problems in fluid dynamics: the collective 
 locomotion of flying animals\, and the interactions between a thin extensi
 ble membrane and inviscid fluid flow. First\, I will present a model of fo
 rmation flight\, viewing the group as a material whose properties arise fr
 om the flow-mediated interactions among its members. This aerodynamic mode
 l explains how flapping flyers produce vortex wakes and how they are influ
 enced by the wakes of others. Long in-line arrays show that the group beha
 ves as a soft\, excitable "crystal" with regularly ordered member "atoms" 
 whose positioning is susceptible to deformations and dynamical instabiliti
 es. Second\, I will talk about rectangular membranes with deflections that
  have significant spanwise nonuniformity and that shed a trailing vortex-s
 heet wake when immersed in a three-dimensional inviscid fluid flow. Exampl
 es include textile fabric\, rubber\, or the skin of swimming and flying an
 imals.
LOCATION:Center for Mathematical Sciences\, Lecture room MR4.
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