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- W1888168013 abstract "Microorganisms can preferentially orient and move along gradients of a chemo-attractant (i.e., chemotax) while colonies of many microorganisms can collectively undergo complex dynamics in response to chemo-attractants that they themselves produce. For colonies or groups of micro-swimmers we investigate how an auto-chemotactic response that should lead to swimmer aggregation is affected by the non-trivial fluid flows that are generated by collective swimming. For this, we consider chemotaxis models based upon a hydrodynamic theory of motile suspensions that are fully coupled to chemo-attractant production, transport, and diffusion. Linear analysis of isotropically ordered suspensions reveals both an aggregative instability due to chemotaxis that occurs independently of swimmer type, and a hydrodynamic instability when the swimmers are pushers. Nonlinear simulations show nonetheless that hydrodynamic interactions can significantly modify the chemotactically-driven aggregation dynamics in suspensions of pushers or pullers. Different states of the dynamics resulting from these coupled interactions in the colony are discussed." @default.
- W1888168013 created "2016-06-24" @default.
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- W1888168013 date "2013-10-28" @default.
- W1888168013 modified "2023-09-27" @default.
- W1888168013 title "Auto-chemotactic micro-swimmer suspensions: modeling, analysis and simulations" @default.
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