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Suppression of bacterial rheotaxis in wavy channels

Title data

Schmidt, Winfried ; Aranson, Igor S. ; Zimmermann, Walter:
Suppression of bacterial rheotaxis in wavy channels.
In: Physical Review Research. Vol. 4 (October 2022) . - 043005.
ISSN 2643-1564
DOI: https://doi.org/10.1103/PhysRevResearch.4.043005

Official URL: Volltext

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Abstract in another language

Controlling the swimming behavior of bacteria is crucial, for example, to prevent contamination of ducts and catheters. We show that bacteria modeled by deformable microswimmers can accumulate in flows through straight microchannels either in their center or on previously unknown attractors near the channel walls. In flows through wavy microchannels we predict a resonance effect for semiflexible microswimmers. As a result, microswimmers can be deflected in a controlled manner so that they swim in modulated channels distributed over the channel cross section rather than localized near the wall or the channel center. Thus, depending on the flow amplitude, both upstream orientation of swimmers and their accumulation at the boundaries, which can promote surface rheotaxis, are suppressed. Our results suggest strategies for controlling the behavior of live and synthetic swimmers in microchannels.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics I > Wilhelm and Else Hearaeus Senior Professorship Theoretical Physics - Soft Matter Theory and Nonlinear Dynamics - Univ.-Prof. Dr. Walter Zimmermann
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics I
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 22 Apr 2023 21:00
Last Modified: 16 Nov 2023 06:49
URI: https://eref.uni-bayreuth.de/id/eprint/76089