Hydrodynamic hovering of swimming bacteria above surfaces
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866909317456723968 |
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| author | Htet, Pyae Hein Das, Debasish Lauga, Eric |
| author_facet | Htet, Pyae Hein Das, Debasish Lauga, Eric |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10447 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hydrodynamic hovering of swimming bacteria above surfaces Htet, Pyae Hein Das, Debasish Lauga, Eric Biological Physics Soft Condensed Matter 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. |
| title | Hydrodynamic hovering of swimming bacteria above surfaces |
| topic | Biological Physics Soft Condensed Matter |
| url | https://arxiv.org/abs/2409.10447 |