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SUMMARY:The strange world of low Reynolds numbers: Fluiddynamics at the mi
 cron scale - Professor Holger Stark
DTSTART:20101124T093000Z
DTEND:20101124T103000Z
UID:TALK27978@talks.cam.ac.uk
CONTACT:Tracy Inman
DESCRIPTION:At the micron scale\, inertia is completely negligible in an a
 queous\nenvironment. This means that microorganisms swimming in water had 
 to\ninvent their own strategies to move forward.\n\nI will explain these s
 trategies at a few examples and demonstrate that\nthe physics at low Reyno
 lds number allows for interesting non-linear\ndynamics such as synchroniza
 tion and Hopf bifurcation.\n\nIn particular\, I will talk about a biomimet
 ic flagellum or cilium.\nThis is a long elastic filament that has been use
 d to construct an\nartificial swimmer or to transport fluid. I will then d
 emonstrate how\nan array of cilia synchronize into metachronal waves and f
 inally\nintroduce how we model bacterial locomotion. Bacteria move forward
 \nwith the help of a rotating bundel of helical filaments. Modeling\nthese
  filaments and their actuation by a rotary motor offers\ninteresting new i
 nsights into the problem.\n
LOCATION:PoM Seminar Room
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