Hydrodynamic hovering of swimming bacteria above surfaces
Htet, Pyae Hein and Das, Debasish and Lauga, Eric (2024) Hydrodynamic hovering of swimming bacteria above surfaces. Physical Review Research, 6 (3). L032070. ISSN 2643-1564 (https://doi.org/10.1103/physrevresearch.6.l032070)
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Abstract
Flagellated bacteria are hydrodynamically attracted to rigid walls, yet past work shows a "hovering"state where they swim stably at a finite height above surfaces. We use numerics and theory to reveal the physical origin of hovering. Simulations first show that hovering requires an elongated cell body and results from a tilt away from the wall. Theoretical models then identify two essential asymmetries: the response of width-asymmetric cells to active flows created by length-asymmetric cells. A minimal model reconciles near- and far-field hydrodynamics, capturing all key features of hovering.
ORCID iDs
Htet, Pyae Hein, Das, Debasish
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Item type: Article ID code: 90734 Dates: DateEvent19 September 2024Published25 July 2024AcceptedSubjects: Science > Mathematics Department: Faculty of Science > Mathematics and Statistics
University of Strathclyde > University of StrathclydeDepositing user: Pure Administrator Date deposited: 01 Oct 2024 10:12 Last modified: 19 Feb 2025 08:17 URI: https://strathprints.strath.ac.uk/id/eprint/90734