Journal article
Simultaneous emergence of active turbulence and odd viscosity in a colloidal chiral active system
- Abstract:
- Active fluids display collective phenomena such as active turbulence or odd viscosity, which refer to spontaneous complex and transverse flow. The simultaneous emergence of these seemingly separate phenomena is here reported in experiment for a chiral active fluid composed of a carpet of standing and spinning colloidal rods, and in simulations for synchronously rotating hard discs in a hydrodynamic explicit solvent. Experiments and simulations reveal that multi-scale eddies emerge, a hallmark of active turbulence, with a power-law decay of the kinetic-energy spectrum, a feature of self-similar dynamics. Moreover, the particles are dragged to the centre of the vortices, a telltale sign of odd viscosity. The weak compressibility of the system enables an explicit measurement of the odd viscosity in bulk via the relation between local vorticity and excess density. Our findings are relevant for the understanding of biological systems and for the design of microrobots with collective self-organized behavior.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 3.5MB, Terms of use)
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- Publisher copy:
- 10.1038/s42005-023-01442-3
Authors
+ National Natural Science Foundation of China
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- Funder identifier:
- https://ror.org/01h0zpd94
- Funding agency for:
- Gao, Y
- Grant:
- 11774237
+ Gauss Centre for Supercomputing
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- Funder identifier:
- https://ror.org/0585fsj26
- Funding agency for:
- Ripoll, M
- Ramírez Medina, CA
- Mecke, J
+ Natural Science Foundation of Guangdong Provinc
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- Funding agency for:
- Gao, Y
- Grant:
- 2022A1515011800
+ Helmholtz Association of German Research Centres
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- Funder identifier:
- https://ror.org/0281dp749
- Publisher:
- Springer Nature
- Journal:
- Communications Physics More from this journal
- Volume:
- 6
- Issue:
- 1
- Article number:
- 324
- Publication date:
- 2023-11-11
- Acceptance date:
- 2023-10-27
- DOI:
- EISSN:
-
2399-3650
- ISSN:
-
2399-3650
- Language:
-
English
- Pubs id:
-
1569996
- Local pid:
-
pubs:1569996
- Deposit date:
-
2025-03-17
- ARK identifier:
Terms of use
- Copyright holder:
- Mecke et al.
- Copyright date:
- 2023
- Rights statement:
- © The Author(s) 2023. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Licence:
- CC Attribution (CC BY)
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