Conditions of enhanced evaporation for nanofluids droplet and inhibition of coffee-ring effect under buoyancy and Marangoni convection

doi:10.1016/j.surfin.2023.103320

	Conditions of enhanced evaporation for nanofluids droplet and inhibition of coffee-ring effect under buoyancy and Marangoni convection
	Tao YQ(陶跃群)2; Liu QS(刘秋生)1,2
刊名	SURFACES AND INTERFACES
	2023-11-01
卷号	42 页码:9
关键词	Nanofluid sessile droplet Evaporation kinetics Deposition pattern Buoyancy convection Marangoni convection
ISSN号	2468-0230
DOI	10.1016/j.surfin.2023.103320
通讯作者	Liu, Qiu-Sheng(liu@imech.ac.cn)
英文摘要	Evaporation of nanofluid droplets whose size is larger than capillary length is common in industrial processes, but there is currently a lack of research on the evaporation kinetics and more complex deposition patterns under the combined effects of buoyancy and Marangoni convection of large evaporating droplet. Experimental investigations on evaporation of Al2O3-H2O nanofluid sessile droplet with initial contact line diameter of 4 mm on heating PTFE coating substrate are reported. The variation in contact angle, contact radius, and droplet volume over time under different conditions were obtained through experiments. The average evaporation rate is calculated. Internal flow characteristics are inferred through the surface temperature distribution detected by the top view infrared camera. The constant contact radius mode takes place at the beginning of evaporation. Then mixed evaporation mode and stick slip mode may occur for different substrate temperature, nanoparticle mass concentration and nanoparticle size. Increasing nanoparticle size causes a decrease in average evaporation rate. Whether the use of nanofluids can improve evaporation rate and heat transfer or not depends on multiple factors. Convection cells exist, and three kinds of deposition patterns are formed due to the underlying coupled transport phenomena. Under the combined effect of buoyancy and Marangoni convection in this article, the most common coffee-ring pattern does not appear. The deposition patterns are directly affected by the pinning stability, which decrease at higher temperature.
分类号	一类
资助项目	Bureau of International Cooperation of Chinese Academy of Sciences[115111KYSB2020008] ; Science and Technology Innovation 2025 Major Project of Ningbo City[2022Z213] ; National Natural Science Foundation of China[11532015] ; China Manned Space Program (CSS-MT)
WOS关键词	DEPOSITION ; PATTERNS ; WATER ; NANOPARTICLES ; SIZES
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:001072040000001
资助机构	Bureau of International Cooperation of Chinese Academy of Sciences ; Science and Technology Innovation 2025 Major Project of Ningbo City ; National Natural Science Foundation of China ; China Manned Space Program (CSS-MT)
其他责任者	Liu, Qiu-Sheng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93020]
专题	力学研究所_国家微重力实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Micrograv Lab, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Tao YQ,Liu QS. Conditions of enhanced evaporation for nanofluids droplet and inhibition of coffee-ring effect under buoyancy and Marangoni convection[J]. SURFACES AND INTERFACES,2023,42:9.
APA	陶跃群,&刘秋生.(2023).Conditions of enhanced evaporation for nanofluids droplet and inhibition of coffee-ring effect under buoyancy and Marangoni convection.SURFACES AND INTERFACES,42,9.
MLA	陶跃群,et al."Conditions of enhanced evaporation for nanofluids droplet and inhibition of coffee-ring effect under buoyancy and Marangoni convection".SURFACES AND INTERFACES 42(2023):9.