Size-dependent spontaneous oscillations of Leidenfrost droplets
A liquid droplet hovering on a hot solid surface is commonly referred to as a Leidenfrost droplet. In this study, we discover that a Leidenfrost droplet spontaneously performs a series of distinct oscillations as it shrinks during the span of its life. The oscillation first starts out erratically, f...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/161274 |
| _version_ | 1811683887145811968 |
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| author | Liu, Dongdong Tran, Tuan |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Liu, Dongdong Tran, Tuan |
| author_sort | Liu, Dongdong |
| collection | NTU |
| description | A liquid droplet hovering on a hot solid surface is commonly referred to as a Leidenfrost droplet. In this study, we discover that a Leidenfrost droplet spontaneously performs a series of distinct oscillations as it shrinks during the span of its life. The oscillation first starts out erratically, followed by a stage with stable frequencies, and finally turns into periodic bouncing with signatures of a parametric oscillation and occasional resonances. The last bouncing stage exhibits nearly perfect collisions. We showed experimentally and theoretically the enabling effects of each oscillation mode and how the droplet switches between such modes. We finally show that these spontaneous oscillation modes and the conditions for transitioning between modes are universal for all tested combinations of liquids and surfaces. |
| first_indexed | 2024-10-01T04:19:52Z |
| format | Journal Article |
| id | ntu-10356/161274 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:19:52Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1612742023-11-03T07:20:09Z Size-dependent spontaneous oscillations of Leidenfrost droplets Liu, Dongdong Tran, Tuan School of Mechanical and Aerospace Engineering HP-NTU Digital Manufacturing Corporate Lab Engineering::Mechanical engineering Boiling Thermocapillarity A liquid droplet hovering on a hot solid surface is commonly referred to as a Leidenfrost droplet. In this study, we discover that a Leidenfrost droplet spontaneously performs a series of distinct oscillations as it shrinks during the span of its life. The oscillation first starts out erratically, followed by a stage with stable frequencies, and finally turns into periodic bouncing with signatures of a parametric oscillation and occasional resonances. The last bouncing stage exhibits nearly perfect collisions. We showed experimentally and theoretically the enabling effects of each oscillation mode and how the droplet switches between such modes. We finally show that these spontaneous oscillation modes and the conditions for transitioning between modes are universal for all tested combinations of liquids and surfaces. Agency for Science, Technology and Research (A*STAR) This research was conducted in collaboration with HP Inc. and supported by Nanyang Technological University and the Singapore Government through the Industry Alignment Fund–Industry Collaboration Projects Grant. 2022-08-23T06:17:54Z 2022-08-23T06:17:54Z 2020 Journal Article Liu, D. & Tran, T. (2020). Size-dependent spontaneous oscillations of Leidenfrost droplets. Journal of Fluid Mechanics, 902, A21-. https://dx.doi.org/10.1017/jfm.2020.576 0022-1120 https://hdl.handle.net/10356/161274 10.1017/jfm.2020.576 2-s2.0-85091769056 902 A21 en Journal of Fluid Mechanics © 2020 The Author(s). Published by Cambridge University Press. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Boiling Thermocapillarity Liu, Dongdong Tran, Tuan Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title | Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title_full | Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title_fullStr | Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title_full_unstemmed | Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title_short | Size-dependent spontaneous oscillations of Leidenfrost droplets |
| title_sort | size dependent spontaneous oscillations of leidenfrost droplets |
| topic | Engineering::Mechanical engineering Boiling Thermocapillarity |
| url | https://hdl.handle.net/10356/161274 |
| work_keys_str_mv | AT liudongdong sizedependentspontaneousoscillationsofleidenfrostdroplets AT trantuan sizedependentspontaneousoscillationsofleidenfrostdroplets |