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Title: Hydrodynamic schooling of flapping swimmers

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9514· OSTI ID:1242274

Fish schools and bird flocks are fascinating examples of collective behaviours in which many individuals generate and interact with complex flows. Motivated by animal groups on the move, here we explore how the locomotion of many bodies emerges from their flow-mediated interactions. Through experiments and simulations of arrays of flapping wings that propel within a collective wake, we discover distinct modes characterized by the group swimming speed and the spatial phase shift between trajectories of neighbouring wings. For identical flapping motions, slow and fast modes coexist and correspond to constructive and destructive wing–wake interactions. Simulations show that swimming in a group can enhance speed and save power, and we capture the key phenomena in a mathematical model based on memory or the storage and recollection of information in the flow field. Lastly, these results also show that fluid dynamic interactions alone are sufficient to generate coherent collective locomotion, and thus might suggest new ways to characterize the role of flows in animal groups.

Research Organization:
New York Univ. (NYU), NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-88ER25053
OSTI ID:
1242274
Journal Information:
Nature Communications, Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 86 works
Citation information provided by
Web of Science

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Cited By (16)

Collective locomotion of two closely spaced self-propelled flapping plates journal June 2018
Hydrodynamic schooling of multiple self-propelled flapping plates journal August 2018
Self-organization of multiple self-propelling flapping foils: energy saving and increased speed journal December 2019
Bio-inspired self-agitator for convective heat transfer enhancement journal September 2018
Collective locomotion of two self-propelled flapping plates with different propulsive capacities journal November 2018
The effect of undulations on the particle stress in dilute suspensions of rod-like particles journal March 2017
Synchronisation through learning for two self-propelled swimmers journal March 2017
Classifying vortex wakes using neural networks journal February 2018
Flow interactions of two- and three-dimensional networked bio-inspired control elements in an in-line arrangement journal May 2018
Water flow impacts group behavior in zebrafish ( Danio rerio ) journal September 2016
Stable formations of self-propelled fish-like swimmers induced by hydrodynamic interactions journal October 2018
Improving the propulsion speed of a heaving wing through artificial evolution of shape
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  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 475, Issue 2221 https://doi.org/10.1098/rspa.2018.0375
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On the energetics and stability of a minimal fish school posted_content April 2019
Self-propelled plate in wakes behind tandem cylinders journal September 2019
Phase difference effect on collective locomotion of two tandem autopropelled flapping foils journal May 2019
On the energetics and stability of a minimal fish school journal August 2019