Home page > Seminars > Séminaires théorie > Theory Club Friday the 16th of April at 10:30 (Zoom). Amin Doostmohammadi: "Taming Active Matter: from dancing defects to autonomous shells".
Theory Club Friday the 16th of April at 10:30 (Zoom). Amin Doostmohammadi: "Taming Active Matter: from dancing defects to autonomous shells"
Unless otherwise stated, seminars and defences take place at 11:30 in room 454A of Condorcet building.
Taming Active Matter: from dancing defects to autonomous shells
Amin Doostmohammadi
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 disclinations 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 (ii) how self-propelled defects lead to finding an unanticipated mechanism for cell death. I 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.
Contact : Équipe séminaires / Seminar team - Published on / Publié le 14 October 2021
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