Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144974
Title: Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS)
Authors: Gonzalez-Avila, Silvestre Roberto
Nguyen, Dang Minh
Arunachalam, Sankara
Domingues, Eddy M.
Mishra, Himanshu
Ohl, Claus-Dieter
Keywords: Science::Physics
Issue Date: 2020
Source: Gonzalez-Avila, S. R., Nguyen, D. M., Arunachalam, S., Domingues, E. M., Mishra, H., & Ohl, C.-D. (2020). Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS). Science Advances, 6(13), eaax6192-. doi:10.1126/sciadv.aax6192
Journal: Science Advances
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://hdl.handle.net/10356/144974
ISSN: 2375-2548
DOI: 10.1126/sciadv.aax6192
Rights: © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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