Motion of Droplets in Lyophilic Axially Varying Geometry-Gradient Tubes

doi:10.1021/acs.langmuir.3c00746

	Motion of Droplets in Lyophilic Axially Varying Geometry-Gradient Tubes
	Xiao ZQ(肖志强); Hu, Xiaoling ; Wu D(吴笛); Song, Kui
刊名	LANGMUIR
	2023-05-26
卷号	39 期号:22 页码:7901-7911
ISSN号	0743-7463
DOI	10.1021/acs.langmuir.3c00746
英文摘要	Droplet transport occurs frequently in nature and has a wide range of applications. We studied the droplet motion in a lyophilic axially varying geometry-gradient tube (AVGGT). The motion of the AVGGT in two directions-from the large opening side (L) to the small opening side (S) and from S to L-was theoretically and experimentally analyzed. The droplet dynamic behaviors, such as the self-transport behavior and the droplet stuck behavior, are explored from the view points of mechanics and energy. We found that the surface tension force of a three-phase contact line can be either a driving or an impeding force depending on the various droplet geometries in different AVGGTs. An important contributing factor to the self-transport behavior of a droplet moving from L to S in an AVGGT is the bridge liquid force caused by negative pressure inside the droplet, which is always pointing in the direction of S. As a result of experiments, we investigated the relationship between droplet motion and correlated parameters. The theoretical model based on the simplified Navier-Stokes equation was developed to explain the corresponding mechanism of the droplet motion. Additionally, dimensional analysis was carried out for the droplet stuck behavior of a droplet moving from S to L in an AVGGT to investigate the relationship between the droplet stopping location and the correlated parameters and thus obtain the required geometry for the droplet stopping location.
分类号	二类
WOS研究方向	Chemistry ; Materials Science
语种	英语
WOS记录号	WOS:001011104400001
资助机构	National Natural Science Foundation of China [12172320] ; Research Foundation of Education Bureau of Hunan Province [20B558, 20C1756] ; Natural Science Foundation of Hunan Province [2021JJ30642]
其他责任者	Song, K (corresponding author), Xiangtan Univ, Sch Mech Engn & Mech, Xiangtan 411105, Peoples R China. ; Song, K (corresponding author), Xiangtan Univ, Inst Rheol Mech, Xiangtan 411105, Peoples R China. ; Wu, D (corresponding author), Chinese Acad Sci, Inst Mech, Micrograv Key Lab, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92576]
专题	力学研究所_国家微重力实验室
作者单位	1.{Xiao, Zhiqiang, Hu, Xiaoling, Song, Kui} Xiangtan Univ, Sch Mech Engn & Mech, Xiangtan 411105, Peoples R China 2.{Hu, Xiaoling, Song, Kui} Xiangtan Univ, Inst Rheol Mech, Xiangtan 411105, Peoples R China 3.{Wu, Di} Chinese Acad Sci, Inst Mech, Micrograv Key Lab, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xiao ZQ,Hu, Xiaoling,Wu D,et al. Motion of Droplets in Lyophilic Axially Varying Geometry-Gradient Tubes[J]. LANGMUIR,2023,39(22):7901-7911.
APA	肖志强,Hu, Xiaoling,吴笛,&Song, Kui.(2023).Motion of Droplets in Lyophilic Axially Varying Geometry-Gradient Tubes.LANGMUIR,39(22),7901-7911.
MLA	肖志强,et al."Motion of Droplets in Lyophilic Axially Varying Geometry-Gradient Tubes".LANGMUIR 39.22(2023):7901-7911.