Self-peeling of frozen water droplets upon impacting a cold surface
Freezing of water droplets impacting a cold substrate is a commonly encountered circumstance impairing the performance and safety of various applications. Active methods of ice removal such as heating or mechanical means are energy intensive and inconvenient. Here, we report a passive ice removal me...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/160993 |
| _version_ | 1811692066653077504 |
|---|---|
| author | Fang, Wen-Zhen Zhu, Fangqi Zhu, Lailai Tao, Wen-Quan Yang, Chun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Fang, Wen-Zhen Zhu, Fangqi Zhu, Lailai Tao, Wen-Quan Yang, Chun |
| author_sort | Fang, Wen-Zhen |
| collection | NTU |
| description | Freezing of water droplets impacting a cold substrate is a commonly encountered circumstance impairing the performance and safety of various applications. Active methods of ice removal such as heating or mechanical means are energy intensive and inconvenient. Here, we report a passive ice removal method via harvesting the thermal-mechanical stress of ice, leading to the self-peeling of frozen water droplets upon impacting a cold substrate. We find that the frozen ice completely self-peels and is then easily removable from a cold hydrophobic surface whiles the ice exhibits cracking and remains firmly sticky to a hydrophilic surface. The peeling behaviors of frozen water droplets are then scrutinized by varying the subcooling degree, impact parameters and wettability. Moreover, we develop a theoretical model to characterize the peeling and bending behaviors of the ice and also provides a simple criterion to predict the occurrence of complete self-peeling, facilitating the design of anti-icing surfaces. |
| first_indexed | 2024-10-01T06:29:53Z |
| format | Journal Article |
| id | ntu-10356/160993 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:29:53Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1609932022-08-10T08:44:36Z Self-peeling of frozen water droplets upon impacting a cold surface Fang, Wen-Zhen Zhu, Fangqi Zhu, Lailai Tao, Wen-Quan Yang, Chun School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Hydrophobicity Cold Substrates Freezing of water droplets impacting a cold substrate is a commonly encountered circumstance impairing the performance and safety of various applications. Active methods of ice removal such as heating or mechanical means are energy intensive and inconvenient. Here, we report a passive ice removal method via harvesting the thermal-mechanical stress of ice, leading to the self-peeling of frozen water droplets upon impacting a cold substrate. We find that the frozen ice completely self-peels and is then easily removable from a cold hydrophobic surface whiles the ice exhibits cracking and remains firmly sticky to a hydrophilic surface. The peeling behaviors of frozen water droplets are then scrutinized by varying the subcooling degree, impact parameters and wettability. Moreover, we develop a theoretical model to characterize the peeling and bending behaviors of the ice and also provides a simple criterion to predict the occurrence of complete self-peeling, facilitating the design of anti-icing surfaces. Ministry of Education (MOE) Published version This work was supported by National Postdoctoral Program for Innovative Talents (No. BX2021235) and the Ministry of Education of Singapore via Tier 2 Academic Research Fund (MOE2016-T2-1-114)(awarded to C.Y.). W.Z.F. thanks the fund supported by Key Laboratory of Icing and Anti/De-icing of CARDC (Grant No. IADL20210105). L.Z. thanks the start-up grant (Grant No. R-265-000-696-133) given by the National University of Singapore. 2022-08-10T08:44:36Z 2022-08-10T08:44:36Z 2022 Journal Article Fang, W., Zhu, F., Zhu, L., Tao, W. & Yang, C. (2022). Self-peeling of frozen water droplets upon impacting a cold surface. Communications Physics, 5(1), 51-. https://dx.doi.org/10.1038/s42005-022-00827-0 2399-3650 https://hdl.handle.net/10356/160993 10.1038/s42005-022-00827-0 2-s2.0-85126225947 1 5 51 en BX2021235 MOE2016-T2-1-114 Communications Physics © 2022 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Hydrophobicity Cold Substrates Fang, Wen-Zhen Zhu, Fangqi Zhu, Lailai Tao, Wen-Quan Yang, Chun Self-peeling of frozen water droplets upon impacting a cold surface |
| title | Self-peeling of frozen water droplets upon impacting a cold surface |
| title_full | Self-peeling of frozen water droplets upon impacting a cold surface |
| title_fullStr | Self-peeling of frozen water droplets upon impacting a cold surface |
| title_full_unstemmed | Self-peeling of frozen water droplets upon impacting a cold surface |
| title_short | Self-peeling of frozen water droplets upon impacting a cold surface |
| title_sort | self peeling of frozen water droplets upon impacting a cold surface |
| topic | Engineering::Mechanical engineering Hydrophobicity Cold Substrates |
| url | https://hdl.handle.net/10356/160993 |
| work_keys_str_mv | AT fangwenzhen selfpeelingoffrozenwaterdropletsuponimpactingacoldsurface AT zhufangqi selfpeelingoffrozenwaterdropletsuponimpactingacoldsurface AT zhulailai selfpeelingoffrozenwaterdropletsuponimpactingacoldsurface AT taowenquan selfpeelingoffrozenwaterdropletsuponimpactingacoldsurface AT yangchun selfpeelingoffrozenwaterdropletsuponimpactingacoldsurface |