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Evaporation dynamics and deposition patterns of ethanol-based Al2O3 nanofluid droplets: Effects of particle sizes and substrate temperatures

文献类型：期刊论文

作者Wei, Youqiang1,2; Tao, Yuequn3; Lin, Yukai4; Feng, Yanhui1,2; Chu, Fuqiang1,2
刊名COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
出版日期2025-08-20
卷号719页码:9
关键词Nanofluid droplet evaporation Particle sizes Substrate temperatures Convection instability Deposition patterns
ISSN号0927-7757
DOI10.1016/j.colsurfa.2025.137040
通讯作者Tao, Yuequn(taoyuequn@imech.ac.cn) ; Chu, Fuqiang(chufq@ustb.edu.cn)
英文摘要The evaporation of nanofluid droplets holds significant potential for applications in thermal management. Nonetheless, the ways in which nanoparticles affect the evaporation dynamics and deposition properties of nanofluid droplets are still not well understood. Here, we investigate the effects of Al2O3 nanoparticle sizes and substrate temperatures on the wetting characteristics, evaporation rate, and particle deposition behavior of ethanol-Al2O3 nanofluid droplets. Additionally, the features and transitions of internal convective instabilities are observed and discussed. The results reveal that the addition of nanoparticles has a minor impact on the changes in wetting patterns during droplet evaporation, and all droplets evaporate in a mixed mode. Nanoparticle size plays a pivotal role in regulating deposition patterns and wetted area, which in turn indirectly affects the evaporation rate. Specifically, the heat flux at the solid-liquid interface and the evaporation rate are enhanced compared to the base fluid, with these differences becoming more pronounced at higher substrate temperatures and with larger nanoparticle sizes. The internal convection within the droplets is primarily driven by Marangoni flow, and the presence of nanoparticles has negligible influence on the flow behavior. Smaller nanoparticles tend to deposit near the center of the droplet, resulting in a reduced coffee-ring effect, whereas larger nanoparticles
WOS关键词SESSILE ; DROPS
资助项目National Key Laboratory of Spacecraft Thermal Control[NKLST-JJ-202401009]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:001484937600003
资助机构National Key Laboratory of Spacecraft Thermal Control
源URL[http://dspace.imech.ac.cn/handle/311007/101522]  
专题力学研究所_国家微重力实验室
通讯作者Tao, Yuequn; Chu, Fuqiang
作者单位1.Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China
2.China Acad Space Technol, Beijing Inst Spacecraft Syst Engn, Natl Key Lab Spacecraft Thermal Control, Beijing 100094, Peoples R China
3.Chinese Acad Sci, Natl Micrograv Lab, Inst Mech, Beijing 100190, Peoples R China
4.Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Youqiang,Tao, Yuequn,Lin, Yukai,et al. Evaporation dynamics and deposition patterns of ethanol-based Al2O3 nanofluid droplets: Effects of particle sizes and substrate temperatures[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2025,719:9.
APA Wei, Youqiang,Tao, Yuequn,Lin, Yukai,Feng, Yanhui,&Chu, Fuqiang.(2025).Evaporation dynamics and deposition patterns of ethanol-based Al2O3 nanofluid droplets: Effects of particle sizes and substrate temperatures.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,719,9.
MLA Wei, Youqiang,et al."Evaporation dynamics and deposition patterns of ethanol-based Al2O3 nanofluid droplets: Effects of particle sizes and substrate temperatures".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 719(2025):9.

入库方式： OAI收割

来源：力学研究所

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