干旱区生态环境知识资源中心(Arid): Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces

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DOI	10.1016/j.commatsci.2020.109616
	Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces
	Wang, Shuai 1,4; Peng, Zhilong 1,4; Li, Jianjun 2; Yang, Yazheng 1,4; Wang, Chao 3,5; Chen, Shaohua 1,4
通讯作者	Wang, Chao ; Chen, Shaohua
来源期刊	COMPUTATIONAL MATERIALS SCIENCE
ISSN	0927-0256
EISSN	1879-0801
出版年	2020
卷号	175
英文摘要	Spontaneous droplet aggregation has great potential applications in liquid transportation, droplet-based microfluidics and water collection in deserts. Several novel hierarchical functional surfaces have been well prepared experimentally, on which small droplets would aggregate to form large droplets. The common feature of the hierarchical surface is wedge-shaped functional zone. However, how to guarantee the stability of water collecting function in real design and application is still lack of theoretical guidance. Based on molecular dynamics simulations, numerical experiments are systematically carried out in the present paper. Several important influencing factors of droplet spontaneous aggregation are studied. It is found that three typical size-dependent moving patterns of droplets may exist on such a hierarchical functional surface, i.e. lingering, pinning and directional transporting. The physical mechanism is further revealed for each pattern in terms of potential energy, which significantly depends on the wedge angle, direction of the wedge and symmetry of the bifurcation of each level. In order to achieve spontaneous droplet aggregation effectively, three conditions need to be met a relatively small wedge angle at each level, wedges in the same direction at different levels, and asymmetric arrangement of wedges at the same level. A three-level functional surface is further numerically designed, which can realize water collection successfully. The results in this paper should be useful for the precise design of hierarchical functional surfaces of water collection in practical application.
英文关键词	Spontaneous droplet aggregation Functional surface Hierarchical wedge-shaped zone Influencing factors Water collection
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000519566300004
WOS关键词	WATER COLLECTION ; WETTABILITY ; GRAPHENE ; MOTION ; GRADIENTS ; TRANSPORT ; BEHAVIOR
WOS类目	Materials Science, Multidisciplinary
WOS研究方向	Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314278
作者单位	1.Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China; 2.Cent South Univ, Coll Mech & Elect Engn, State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 4.Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China; 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shuai,Peng, Zhilong,Li, Jianjun,et al. Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces[J],2020,175.
APA	Wang, Shuai,Peng, Zhilong,Li, Jianjun,Yang, Yazheng,Wang, Chao,&Chen, Shaohua.(2020).Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces.COMPUTATIONAL MATERIALS SCIENCE,175.
MLA	Wang, Shuai,et al."Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces".COMPUTATIONAL MATERIALS SCIENCE 175(2020).