An inertial mechanism behind dynamic station holding by fish swinging in a vortex street

Harvey, SamTucker, Muhawenimana, Valentine ORCID: https://orcid.org/0000-0002-9538-2229, Muller, Stephanie, Wilson, Catherine A.M.E. ORCID: https://orcid.org/0000-0002-7128-590X and Denissenko, Petr 2022. An inertial mechanism behind dynamic station holding by fish swinging in a vortex street. Scientific Reports 12 , 12660. 10.1038/s41598-022-16181-8

Preview	PDF - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview
Preview	PDF - Supplemental Material Available under License Creative Commons Attribution. Download (11MB) | Preview

Abstract

Many aquatic and aerial animal species are known to utilise their surrounding flow field and/or the induced flow field of a neighbour to reduce their physical exertion, however, the mechanism by which such benefits are obtained has remained elusive. In this work, we investigate the swimming dynamics of rainbow trout in the wake of a thrust-producing oscillating hydrofoil. Despite the higher flow velocities in the inner region of the vortex street, some fish maintain position in this region, while exhibiting an altered swimming gait. Estimates of energy expenditure indicate a reduction in the propulsive cost when compared to regular swimming. By examining the accelerations of the fish, an explanation of the mechanism by which energy is harvested from the vortices is proposed. Similar to dynamic soaring employed by albatross, the mechanism can be linked to the non-equilibrium hydrodynamic forces produced when fish encounter the cross-flow velocity generated by the vortex street.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Engineering
Subjects:	Q Science > Q Science (General)
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License,
Publisher:	Nature Research
ISSN:	2045-2322
Related URLs:	Publisher
Date of First Compliant Deposit:	26 July 2022
Date of Acceptance:	6 July 2022
Last Modified:	01 Aug 2024 13:20
URI:	https://orca.cardiff.ac.uk/id/eprint/151465

Actions (repository staff only)

Edit Item