Journal article
Flow transitions and length scales of a channel-confined active nematic
- Abstract:
- We perform lattice Boltzmann simulations of an active nematic fluid confined in a two-dimensional channel to study the range of flow states that are stabilised by the confinement: unidirectional flow, oscillatory flow, the dancing state, localised active turbulence and fully-developed active turbulence. We analyse the flows in Fourier space, and measure a range of different length scales which describe the flows. We argue that the different states occur as a result of flow instabilities inherent to the system. As a consequence the characteristic length scale for oscillatory flow, the dancing state and localised active turbulence is set by the channel width. Fully-developed active turbulence occurs only when the channel width is larger than the intrinsic, active length scale of the bulk fluid. The results clarify why the activity number is a control parameter for the flow transitions.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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Access Document
- Files:
-
-
(Preview, Accepted manuscript, pdf, 13.3MB, Terms of use)
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- Publisher copy:
- 10.1039/d1sm01434j
Authors
- Publisher:
- Royal Society of Chemistry
- Journal:
- Soft Matter More from this journal
- Volume:
- 17
- Issue:
- 2021
- Pages:
- 10640-10648
- Publication date:
- 2021-11-17
- Acceptance date:
- 2021-11-10
- DOI:
- EISSN:
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1744-6848
- ISSN:
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1744-683X
- Language:
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English
- Keywords:
- Pubs id:
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1211163
- Local pid:
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pubs:1211163
- Deposit date:
-
2021-11-23
Terms of use
- Copyright holder:
- The Royal Society of Chemistry
- Copyright date:
- 2021
- Rights statement:
- © The Royal Society of Chemistry 2021
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Royal Society of Chemistry at: https://doi.org/10.1039/D1SM01434J
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