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Dynamics of microswimmers near a soft penetrable interface
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Feng, Chao, Molina, John J., Turner, Matthew S. and Yamamoto, Ryoichi (2022) Dynamics of microswimmers near a soft penetrable interface. Physical Review Research, 4 (4). 043202 . doi:10.1103/PhysRevResearch.4.043202 ISSN 2643-1564.
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Official URL: http://doi.org/10.1103/PhysRevResearch.4.043202
Abstract
Few simulations exist for microswimmers near deformable interfaces. Here, we present numerical simulations of the hydrodynamic flows associated with a single microswimmer embedded in a binary fluid mixture. The two fluids demix, separated by a penetrable and deformable interface that we assume to be initially prepared in its planar ground state. We find that the microswimmer can either penetrate the interface, move parallel to it, or bounce back off it. We analyze how the trajectory depends on the swimmer type (pusher/puller) and the angle of incidence with respect to the interface. Our simulations are performed in a system with periodic boundary conditions, corresponding to an infinite array of fluid interfaces. A puller reaches a steady state in which it either swims parallel to the interface or selects a perpendicular orientation, repeatedly penetrating through the interface. In contrast, a pusher follows a bouncing trajectory between two interfaces. We discuss several examples in biology in which swimmers penetrate soft interfaces. Our paper can be seen as a highly simplified model of such processes.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Soft condensed matter, Biomedical engineering -- Research, Biological transport, Fluid Dynamics, Biomechanics, Surface tension | ||||||
Journal or Publication Title: | Physical Review Research | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 2643-1564 | ||||||
Official Date: | 21 December 2022 | ||||||
Dates: |
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Volume: | 4 | ||||||
Number: | 4 | ||||||
Article Number: | 043202 | ||||||
DOI: | 10.1103/PhysRevResearch.4.043202 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) |
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