Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session J08: Biofluids: Locomotion Optimization
4:35 PM–6:32 PM,
Sunday, November 19, 2023
Room: 103B
Chair: Mitchell Ford, Oklahoma State University-Stillwater
Abstract: J08.00006 : Burst-and-coast swimming needs to be optimized to outperform continuous swimming*
5:40 PM–5:53 PM
Presenter:
Gen Li
(Japan Agency for Marine-Earth Science and Technology)
Authors:
Gen Li
(Japan Agency for Marine-Earth Science and Technology)
Dmitry Kolomenskiy
(Skolkovo Institute of Science and Technology, Russia)
Ramiro Godoy-Diana
(ESPCI Paris, France)
Benjamin Thiria
(ESPCI Paris, France)
In our experimental aspect, the fish were induced to swim in a flume at prescribed speeds, with video recordings used to monitor variations in their gait as imposed flow velocities altered. The results show how fish modulates their burst-and-coast gait parameters as swimming velocity changes, and that the burst-and-coast gait change very likely optimize the swimming energetic performance.
In the computational aspect, we established a two-stage protocol. First, we simulated a series of burst-and-coast swim cases with a range of amplitudes and frequencies for the fish undulations. Then, segments from this simulation database were selected, cut and amalgamated to assemble any arbitrary burst-and-coast swimming gait. This approach facilitated a comprehensive comparison between burst-and-coast and continuous swimming. Our findings suggest that when adequately optimized, burst-and-coast swimming can consume less energy than continuous swimming. However, the effectiveness of burst-and-coast swimming strategy can decline drastically if not sufficiently fine-tuned.
*SIP3 Program of the Cabinet Office, Government of JapanJapan Society for the Promotion of Science (JP20K14978)
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