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dc.contributor.authorGonzalez-Avila, Silvestre Roberto
dc.contributor.authorNguyen, Dang Minh
dc.contributor.authorArunachalam, Sankara
dc.contributor.authorDomingues, Eddy
dc.contributor.authorMishra, Himanshu
dc.contributor.authorOhl, Claus-Dieter
dc.date.accessioned2020-03-29T12:31:05Z
dc.date.available2020-03-29T12:31:05Z
dc.date.issued2020-03-27
dc.date.submitted2019-04-08
dc.identifier.citationGonzalez-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
dc.identifier.doi10.1126/sciadv.aax6192
dc.identifier.urihttp://hdl.handle.net/10754/662357
dc.description.abstractCavitation 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.
dc.description.sponsorshipWe thank X. Pita, scientific illustrator at King Abdullah University of Science and Technology (KAUST), for preparing Fig. 2 and V. Unkefer (KAUST) for assistance in editing of the manuscript. H.M. and S.A. thank G. Mahadik (KAUST) for providing specimens of sea skaters (H. germanus) and W. S. Hwang (National University of Singapore) and L. Cheng (Scripps Institution of Oceanography, USA) for providing specimens of springtails.
dc.description.sponsorshipThe research reported in this publication was supported by funding from KAUST under award number BAS/1/1070-01-01.
dc.publisherAmerican Association for the Advancement of Science (AAAS)
dc.relation.urlhttps://advances.sciencemag.org/lookup/doi/10.1126/sciadv.aax6192
dc.rightsArchived with thanks to Science Advances
dc.rights.uriCreative Commons Attribution NonCommercial License 4.0
dc.titleMitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS)
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentInterfacial Lab
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalScience Advances
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment for Soft Matter, Institute for Physics, Otto-von-Guerick University, 39106 Magdeburg, Germany.
dc.contributor.institutionSchool of Physical and Mathematical Sciences, Department of Physics and Applied Physics, Nanyang Technological University, Singapore 637371, Singapore.
dc.identifier.volume6
dc.identifier.issue13
dc.identifier.pageseaax6192
kaust.personArunachalam, Sankara
kaust.personDomingues, Eddy
kaust.personMishra, Himanshu
dc.date.accepted2019-12-31
refterms.dateFOA2020-03-29T12:33:53Z
kaust.acknowledged.supportUnitscientific illustrator
dc.date.published-online2020-03-27
dc.date.published-print2020-03


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