Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session T09: Biofluids: Collective Behavior and Active Matter III
4:25 PM–6:09 PM,
Monday, November 20, 2023
Room: 140A
Chair: David Murphy, University of South Florida
Abstract: T09.00007 : Self-organized traveling wave in a kinetic transport equation for run-and-tumble chemotactic bacteria
5:43 PM–5:56 PM
Presenter:
Shugo Yasuda
(University of Hyogo)
Author:
Shugo Yasuda
(University of Hyogo)
We have recently developed the Monte Carlo (MC) code of the kinetic transport equation which takes into account an adaptation dynamics of the intracellular signal transduction and a non-instantaneous tumbling duration. In this talk, we show our recent numerical results for the self-organized pattern formation based on the MC code. Especially, we put forcus on the bimodal aggregation (i.e., the volcano effect) , which is obverved in a micro-scale aggregation of chemtoactic bacteria. We investigated the microscopic and macroscopic mechanism of the volcano effect and clarified the parameter regime for the volcano effect to take place. In addition, we derived a continum-limit model (i.e., an extended Keller-Segel equation), which can reproduce the volcano effect at the appropriate parameter regime, by the asymptotic analysis of the kinetic transport equation.
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