Please use this identifier to cite or link to this item: http://dx.doi.org/10.25673/38675
Title: Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS)
Author(s): Gonzalez-Avila, Silvestre Roberto
Nguyen, Dang Minh
Arunachalam, Sankara
Domingues, Eddy M.
Mishra, Himanshu
Ohl, Claus-Dieter
Issue Date: 2020
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-389218
Subjects: Cavitation
Vapor bubbles
Mitigating cavitation erosion
Abstract: Cavitation refers to the formation and collapse of vapor bubbles near solid boundaries in high-speed flows, such as ship propellers and pumps. During this process, cavitation bubbles focus fluid energy on the solid surface by forming high-speed jets, leading to damage and downtime of machinery. In response, numerous surface treatments to counteract this effect have been explored, including perfluorinated coatings and surface hardening, but they all succumb to cavitation erosion eventually. Here, we report on biomimetic gas-entrapping microtextured surfaces (GEMS) that robustly entrap air when immersed in water regardless of the wetting nature of the substrate. Crucially, the entrapment of air inside the cavities repels cavitation bubbles away from the surface, thereby preventing cavitation damage. We provide mechanistic insights by treating the system as a potential flow problem of a multi-bubble system. Our findings present a possible avenue for mitigating cavitation erosion through the application of inexpensive and environmentally friendly materials.
URI: https://opendata.uni-halle.de//handle/1981185920/38921
http://dx.doi.org/10.25673/38675
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: OVGU-Publikationsfonds 2020
Journal Title: Science advances
Publisher: Assoc.
Publisher Place: Washington, DC [u.a.]
Volume: 6
Issue: 13
Original Publication: 10.1126/sciadv.aax6192
Page Start: 1
Page End: 11
Appears in Collections:Fakultät für Naturwissenschaften (OA)

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