| Capillary-driven migration of droplets on conical fibers | |
Mao, Yixiao; Zhao, Chengxi; Mu, Kai; Li K(李凯) ; Si, Ting
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| Source Publication | PHYSICS OF FLUIDS
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| 2024-09 | |
| Volume | 36Issue:9Pages:92014 |
| ISSN | 1070-6631 |
| Abstract | A droplet placed on a hydrophilic conical fiber tends to move toward the end of larger radii due to capillary action. Experimental investigations are performed to explore the dynamics of droplets with varying viscosities and volumes on different fibers at the microscale. Droplets are found to accelerate initially and subsequently decelerate during migration. A dynamic model is developed to capture the dynamics of droplet migration, addressing the limitations of previous equilibrium-based scaling laws. Both experimental results and theoretical predictions indicate that droplets on more divergent fibers experience a longer acceleration phase. Additionally, gravitational effects are pronounced on fibers with small cone angles, exerting a substantial influence on droplet migration even below the capillary scale. Moreover, droplets move more slowly on dry fibers compared to those prewetted with the same liquid, primarily attributed to increased friction. The experiments reveal the formation of a residual liquid film after droplet migration on dry fibers, leading to considerable volume loss in the droplets. To encompass the intricacies of migration on dry fibers, the model is refined to incorporate a higher friction coefficient and variable droplet volumes, providing a more comprehensive depiction of the underlying physics. |
| DOI | 10.1063/5.0226483 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001309726400031 |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Organization | National Key Research and Development Program of China10.13039/501100012166 {2023YFB4603701] ; National Key Research and Development Program of China {12202437, 12388101, 12272372] ; National Natural Science Foundation of China ; Opening Fund of State Key Laboratory of Nonlinear Mechanics {2018491, 2023477] ; Youth Innovation Promotion Association CAS {YSBR-087] ; Chinese Academy of Sciences Project for Young Scientists in Basic Research {WK2090000051] ; Fundamental Research Funds for the Central Universities |
| Classification | 一类/力学重要期刊 |
| Ranking | 3+ |
| Contributor | Zhao CX |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97225 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.【Mao, Yixiao & Zhao, Chengxi & Mu, Kai & Si, Ting】 Univ Sci & Technol China, Dept Modern Mech, Hefei 230026, Anhui, Peoples R China 2.【Li, Kai】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.【Li, Kai】 Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Mao, Yixiao,Zhao, Chengxi,Mu, Kai,et al. Capillary-driven migration of droplets on conical fibers[J]. PHYSICS OF FLUIDS,2024,36,9,:92014.Rp_Au:Zhao CX |
| APA | Mao, Yixiao,Zhao, Chengxi,Mu, Kai,李凯,&Si, Ting.(2024).Capillary-driven migration of droplets on conical fibers.PHYSICS OF FLUIDS,36(9),92014. |
| MLA | Mao, Yixiao,et al."Capillary-driven migration of droplets on conical fibers".PHYSICS OF FLUIDS 36.9(2024):92014. |
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