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Continuum models for motile cells in shear flow

Presented by: 
Rachel Bearon
Tuesday 8th December 2015 - 16:15 to 17:00
INI Seminar Room 1
Many micro-organisms such as bacteria and algae swim in fluid environments. This swimming behaviour can interact with fluid motions to generate transport which differs both from that experienced by passive tracers in flow and micro-swimmers in the absence of flow. I will give examples of how population-level models can be derived to describe the spatio-temporal distribution of such swimmers, including a model for slender bacteria which undergo run-and-tumble chemotaxis in a channel (Bearon et al J. Fluid Mech. 2015). The continuum model developed can describe an experimentally observed phenomenon of trapping in high shear which existing drift-diffusion models are unable to capture.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons