Active modulation of surfactant-driven flow instabilities by swarming bacteria

Kotian, HS and Abdulla, AZ and Hithysini, KN and Harkar, S and Joge, S and Mishra, A and Singh, V and Varma, MM (2020) Active modulation of surfactant-driven flow instabilities by swarming bacteria. In: Physical Review E, 101 (1).

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Abstract

Models based on surfactant-driven instabilities have been employed to describe pattern formation by swarming bacteria. However, by definition, such models cannot account for the effect of bacterial sensing and decision making. Here we present a more complete model for bacterial pattern formation which accounts for these effects by coupling active bacterial motility to the passive fluid dynamics. We experimentally identify behaviors which cannot be captured by previous models based on passive population dispersal and show that a more accurate description is provided by our model. It is seen that the coupling of bacterial motility to the fluid dynamics significantly alters the phase space of surfactant-driven pattern formation. We also show that our formalism is applicable across bacterial species.

Item Type:	Journal Article
Publication:	Physical Review E
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society
Keywords:	Decision making; Fluid dynamics; Phase space methods; Surface active agents, Bacterial motility; Bacterial sensing; Bacterial species; Flow instabilities; Passive fluid; Pattern formation; Population dispersal, Bacteria
Department/Centre:	Division of Biological Sciences > Molecular Reproduction, Development & Genetics Division of Interdisciplinary Sciences > Robert Bosch Centre for Cyber Physical Systems Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	13 Feb 2020 08:08
Last Modified:	13 Feb 2020 08:08
URI:	http://eprints.iisc.ac.in/id/eprint/64522

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