| Experimental Investigation of Dropwise Condensation Shedding by Shearing Airflow in Microgravity Using Different Surface Coatings | |
Bonab, MiladShakeri; Minetti, Christoph1; Iorio, CarloSaverio; Zhao DD(赵栋栋); Liu QS(刘秋生) ; Ou, Junfei3; Kempers, Roger; Amirfazli, Alidad
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| Source Publication | LANGMUIR
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| 2023 | |
| ISSN | 0743-7463 |
| Abstract | The shedding kinematics of water droplets in a condensation environment when exposed to aerodynamic forces in microgravity was studied. Understanding the shedding of droplets from a surface is a critical part of the dropwise condensation process for improving heat transfer. Because gravity as a droplet removal technique is not available in space, the use of airflow to shed droplets is considered for condensing heat exchangers in environmental control and life support systems. Surface coatings affect drop adhesion, and here, four different surfaces (PMMA, PS, PTFE, and SHS) and various droplet sizes (80, 60, and 40 mu L) were used to understand the above phenomenon. It was found that the critical velocity to shed a droplet in microgravity was up to 8% lower than that in normal gravity. Also, the effect of the droplet size was investigated for both microgravity and normal gravity; the shedding velocity was lower for microgravity, and it decreased as droplet size increased. Increasing the hydrophobicity of the coating decreased the critical velocity for shedding. Finally, the droplet was found to detach from superhydrophobic surfaces in microgravity. The detachment of droplets from the substrate will hamper the condensation process that can produce a larger fresh area; also, detachment of droplets and entrainment in airflow counter the concept of removing moisture from the air in a dehumidification process. |
| DOI | 10.1021/acs.langmuir.2c01898 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000912720200001 |
| WOS Research Area | Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary |
| WOS Subject | Chemistry ; Materials Science |
| Funding Organization | European Space Agency (ESA) under the MAP program ; China Manned Space Agency (CMSA) |
| Classification | 二类 |
| Ranking | 3+ |
| Contributor | Amirfazli, M (corresponding author), York Univ, Dept Mech Engn, Toronto, ON M3J 1P3, Canada. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91834 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.York Univ, Dept Mech Engn, Toronto, ON M3J 1P3, Canada 2.Univ Libre Bruxelles, Serv Chim Phys, B 1050 Brussels, Belgium 3.Chinese Acad Sci, Inst Mech, Beijing 101400, Peoples R China 4.Jiangsu Univ Technol, Sch Mech Engn, Changzhou 213006, Peoples R China |
| Recommended Citation GB/T 7714 | Bonab, MiladShakeri,Minetti, Christoph,Iorio, CarloSaverio,et al. Experimental Investigation of Dropwise Condensation Shedding by Shearing Airflow in Microgravity Using Different Surface Coatings[J]. LANGMUIR,2023.Rp_Au:Amirfazli, M (corresponding author), York Univ, Dept Mech Engn, Toronto, ON M3J 1P3, Canada. |
| APA | Bonab, MiladShakeri.,Minetti, Christoph.,Iorio, CarloSaverio.,赵栋栋.,刘秋生.,...&Amirfazli, Alidad.(2023).Experimental Investigation of Dropwise Condensation Shedding by Shearing Airflow in Microgravity Using Different Surface Coatings.LANGMUIR. |
| MLA | Bonab, MiladShakeri,et al."Experimental Investigation of Dropwise Condensation Shedding by Shearing Airflow in Microgravity Using Different Surface Coatings".LANGMUIR (2023). |
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| File Name/Size | DocType | Version | Access | License | ||
| Jp2023Fa283.pdf（6093KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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