Hydrodynamic hovering of swimming bacteria above surfaces
Year: 2024
Type: article
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. Published by the American Physical Society 2024
Source: Physical Review Research
Authors: Pyae Hein Htet, Debasish Das, Eric Lauga
Institutions: University of Cambridge, University of Strathclyde
Language: English
Topic: Micro and Nano Robotics
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
OpenAlex ID: W4402641355