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BEGIN:VEVENT
DTSTAMP:20260614T100517Z
DTSTART;VALUE=DATE-TIME:20230113T130000
DTEND;VALUE=DATE-TIME:20230113T140000
SUMMARY:Theory group seminar on "Multi-scale analysis and reduced models 
 for low-Reynolds swimmers"\, SPEAKER: Clément MOREAU
TZID:Europe/London
UID:20230113-8a17841b83cbb3fe0183e612c17208ca@warwick.ac.uk
CREATED:20230109T211924Z
DESCRIPTION:ABSTRACT: Over a long period of time\, or from a distance\, t
 he motion of many swimmers can appear smooth\, with their trajectories a
 ppearing almost ballistic. These long-time behaviours\, however\, often 
 mask more complex dynamics\, such as the side-to-side snakelike motion e
 xhibited by spermatozoa as they swim\, propelled by the frequent and per
 iodic beating of their flagellum\, or shape-changing microorganisms and 
 microrobots. Many models of motion neglect\, often without formal justif
 ication\, these effects in favour of smoother long-term behaviours. In t
 his talk\, I will present recent results based on multi-timescale analys
 is and evaluating the long-term effects of high-frequency oscillations o
 n translational and angular motion for various classical swimming models
  of micro-scale swimmers\, with the purpose of assessing the relevance o
 f neglecting these oscillations\, and derive simplified equivalent model
 s. In particular\, I will focus on the celebrated Jeffery orbit model es
 tablished in 1922\, which can be\, according to our results\, surprising
 ly widely generalised to fast-shape-changing bodies\, and provide an int
 erpretation of these reduced models in terms of « effective shapes ». Th
 is research was carried out in collaboration with M. P. Dalwadi\, B. J. 
 Walker (UCL)\, E. A. Gaffney (U. Oxford) and K. Ishimoto (U. Kyoto).
LOCATION:PS 128
CATEGORIES:Theory Seminar
LAST-MODIFIED:20230109T211924Z
ORGANIZER;CN=Elnaz Darsheshdar:
END:VEVENT
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