Droplet impact on doubly re-entrant structures
Abstract Doubly re-entrant pillars have been demonstrated to possess superior static and dynamic liquid repellency against highly wettable liquids compared to straight or re-entrant pillars. Nevertheless, there has been little insight into how the key structural parameters of doubly re-entrant pilla...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-52951-2 |
| _version_ | 1797274728334884864 |
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| author | Navdeep Sangeet Singh Thanaphun Jitniyom Miguel Navarro-Cía Nan Gao |
| author_facet | Navdeep Sangeet Singh Thanaphun Jitniyom Miguel Navarro-Cía Nan Gao |
| author_sort | Navdeep Sangeet Singh |
| collection | DOAJ |
| description | Abstract Doubly re-entrant pillars have been demonstrated to possess superior static and dynamic liquid repellency against highly wettable liquids compared to straight or re-entrant pillars. Nevertheless, there has been little insight into how the key structural parameters of doubly re-entrant pillars influence the hydrodynamics of impacting droplets. In this work, we carried out numerical simulations and experimental studies to portray the fundamental physical phenomena that can explain the alteration of the surface wettability from adjusting the design parameters of the doubly re-entrant pillars. On the one hand, three-dimensional multiphase flow simulations of droplet impact were conducted to probe the predominance of the overhang structure in dynamic liquid repellency. On the other hand, the numerical results of droplet impact behaviours are agreed by the experimental results for different pitch sizes and contact angles. Furthermore, the dimensions of the doubly re-entrant pillars, including the height, diameter, overhang length and overhang thickness, were altered to establish their effect on droplet repellency. These findings present the opportunity for manipulations of droplet behaviours by means of improving the critical dimensional parameters of doubly re-entrant structures. |
| first_indexed | 2024-03-07T15:02:25Z |
| format | Article |
| id | doaj.art-8128718642204a9d9aaf9c6bb23ccafd |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:02:25Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-8128718642204a9d9aaf9c6bb23ccafd2024-03-05T19:03:20ZengNature PortfolioScientific Reports2045-23222024-02-0114111410.1038/s41598-024-52951-2Droplet impact on doubly re-entrant structuresNavdeep Sangeet Singh0Thanaphun Jitniyom1Miguel Navarro-Cía2Nan Gao3School of Engineering, University of BirminghamSchool of Engineering, University of BirminghamSchool of Engineering, University of BirminghamSchool of Engineering, University of BirminghamAbstract Doubly re-entrant pillars have been demonstrated to possess superior static and dynamic liquid repellency against highly wettable liquids compared to straight or re-entrant pillars. Nevertheless, there has been little insight into how the key structural parameters of doubly re-entrant pillars influence the hydrodynamics of impacting droplets. In this work, we carried out numerical simulations and experimental studies to portray the fundamental physical phenomena that can explain the alteration of the surface wettability from adjusting the design parameters of the doubly re-entrant pillars. On the one hand, three-dimensional multiphase flow simulations of droplet impact were conducted to probe the predominance of the overhang structure in dynamic liquid repellency. On the other hand, the numerical results of droplet impact behaviours are agreed by the experimental results for different pitch sizes and contact angles. Furthermore, the dimensions of the doubly re-entrant pillars, including the height, diameter, overhang length and overhang thickness, were altered to establish their effect on droplet repellency. These findings present the opportunity for manipulations of droplet behaviours by means of improving the critical dimensional parameters of doubly re-entrant structures.https://doi.org/10.1038/s41598-024-52951-2 |
| spellingShingle | Navdeep Sangeet Singh Thanaphun Jitniyom Miguel Navarro-Cía Nan Gao Droplet impact on doubly re-entrant structures Scientific Reports |
| title | Droplet impact on doubly re-entrant structures |
| title_full | Droplet impact on doubly re-entrant structures |
| title_fullStr | Droplet impact on doubly re-entrant structures |
| title_full_unstemmed | Droplet impact on doubly re-entrant structures |
| title_short | Droplet impact on doubly re-entrant structures |
| title_sort | droplet impact on doubly re entrant structures |
| url | https://doi.org/10.1038/s41598-024-52951-2 |
| work_keys_str_mv | AT navdeepsangeetsingh dropletimpactondoublyreentrantstructures AT thanaphunjitniyom dropletimpactondoublyreentrantstructures AT miguelnavarrocia dropletimpactondoublyreentrantstructures AT nangao dropletimpactondoublyreentrantstructures |