Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS)
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 r...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/144974 |
| _version_ | 1826121026814083072 |
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| author | Gonzalez-Avila, Silvestre Roberto Nguyen, Dang Minh Arunachalam, Sankara Domingues, Eddy M. Mishra, Himanshu Ohl, Claus-Dieter |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Gonzalez-Avila, Silvestre Roberto Nguyen, Dang Minh Arunachalam, Sankara Domingues, Eddy M. Mishra, Himanshu Ohl, Claus-Dieter |
| author_sort | Gonzalez-Avila, Silvestre Roberto |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T05:26:01Z |
| format | Journal Article |
| id | ntu-10356/144974 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:26:01Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1449742023-02-28T19:52:38Z Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) Gonzalez-Avila, Silvestre Roberto Nguyen, Dang Minh Arunachalam, Sankara Domingues, Eddy M. Mishra, Himanshu Ohl, Claus-Dieter School of Physical and Mathematical Sciences Science::Physics Cavitation Erosion Gas-entrapping Microtextured Surfaces 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. Published version The research reported in this publication was supported by funding from KAUST under award number BAS/1/1070-01-01. 2020-12-07T06:26:20Z 2020-12-07T06:26:20Z 2020 Journal Article 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 2375-2548 https://hdl.handle.net/10356/144974 10.1126/sciadv.aax6192 32258392 13 6 en Science Advances © 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. application/pdf |
| spellingShingle | Science::Physics Cavitation Erosion Gas-entrapping Microtextured Surfaces Gonzalez-Avila, Silvestre Roberto Nguyen, Dang Minh Arunachalam, Sankara Domingues, Eddy M. Mishra, Himanshu Ohl, Claus-Dieter Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title | Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title_full | Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title_fullStr | Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title_full_unstemmed | Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title_short | Mitigating cavitation erosion using biomimetic gas-entrapping microtextured surfaces (GEMS) |
| title_sort | mitigating cavitation erosion using biomimetic gas entrapping microtextured surfaces gems |
| topic | Science::Physics Cavitation Erosion Gas-entrapping Microtextured Surfaces |
| url | https://hdl.handle.net/10356/144974 |
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