Chirotactic response of microswimmers in fluids with odd viscosity
| Autor: | Hosaka, Yuto, Chatzittofi, Michalis, Golestanian, Ramin, Vilfan, Andrej |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Rev. Research 6, L032044 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevResearch.6.L032044 |
| Popis: | Odd viscosity is a property of chiral active fluids with broken time-reversal and parity symmetries. We show that the flow of such a fluid around a rotating axisymmetric body is exactly solvable and use this solution to determine the orientational dynamics of surface-driven microswimmers. Swimmers with a force-dipole moment exhibit precession around the axis of the odd viscosity. In addition, pushers show bimodal chirotaxis, i.e., alignment parallel or antiparallel to the axis, while pullers orbit in a plane perpendicular to it. A chiral swimmer that itself has a broken parity symmetry can exhibit unimodal chirotaxis and always align in the same direction. Comment: 9 pages, 3 figures + SM |
| Databáze: | arXiv |
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