Drag reduction mechanism of Paramisgurnus dabryanus loach with self-lubricating and flexible micro-morphology

Wu, Liyan and Wang, Huan and Song, Yuqiu and Zhang, Benhua and Xu, Yan and Liu, Cuihong and Yan, Yuying (2020) Drag reduction mechanism of Paramisgurnus dabryanus loach with self-lubricating and flexible micro-morphology. Scientific Reports, 10 (1). ISSN 2045-2322

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Abstract

Underwater machinery withstands great resistance in the water, which can result in consumption of a large amount of power. Inspired by the character that loach could move quickly in mud, the drag reduction mechanism of Paramisgurnus dabryanus loach is discussed in this paper. Subjected to the compression and scraping of water and sediments, a loach could not only secrete a lubricating mucus film, but also importantly, retain its mucus well from losing rapidly through its surface micro structure. In addition, it has been found that flexible deformations can maximize the drag reduction rate. This self-adaptation characteristic can keep the drag reduction rate always at high level in wider range of speeds. Therefore, even though the part of surface of underwater machinery cannot secrete mucus, it should be designed by imitating the bionic micro-morphology to absorb and store fluid, and eventually form a self-lubrication film to reduce the resistance. In the present study, the Paramisgurnus dabryanus loach is taken as the bionic prototype to learn how to avoid or slow down the mucus loss through its body surface. This combination of the flexible and micro morphology method provides a potential reference for drag reduction of underwater machinery.

Item Type: Article
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering
Identification Number: https://doi.org/10.1038/s41598-020-69801-6
Depositing User: Zhou, Elsie
Date Deposited: 19 Aug 2020 02:03
Last Modified: 19 Aug 2020 02:03
URI: http://eprints.nottingham.ac.uk/id/eprint/61368

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