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DTSTART;TZID=America/New_York:20220224T130000
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DTSTAMP:20240213T111913Z
CREATED:20230824T172910Z
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UID:10001308-1645707600-1645713000@cmsa.fas.harvard.edu
SUMMARY:Taming Active Matter: from ordered topological defects to autonomous shells
DESCRIPTION:Abstract: The spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterized by swirls\, jets\, and topological\ndisclinations in their orientation field. I will first discuss two examples of these collective features helping us understand biological processes: (i) to explain the tortoise & hare story in bacterial competition: how motility of Pseudomonas aeruginosa bacteria leads to a slower invasion of bacteria colonies\, which are individually faster\, and\n(ii) how self-propelled defects lead to finding an unanticipated mechanism for cell death. \nI will then discuss various strategies to tame\, otherwise chaotic\, active flows\, showing how hydrodynamic screening of active flows can act as a robust way of controlling and guiding active particles into dynamically ordered coherent structures. I will also explain how combining hydrodynamics with topological constraints can lead to further control of exotic morphologies of active shells.
URL:https://cmsa.fas.harvard.edu/event/taming-active-matter-from-ordered-topological-defects-to-autonomous-shells/
CATEGORIES:Active Matter Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Active-Matter-Seminar-02.24.22.png
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