Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces

doi:10.1016/j.commatsci.2020.109616

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces
	Wang S(王帅)3,5; Peng ZL(彭志龙)3,5; Li JJ(李建军)1; Yang YZ(杨亚政)3,5; Wang C(王超)2,4; Chen SH(陈少华)3,5
刊名	COMPUTATIONAL MATERIALS SCIENCE
	2020-04-01
卷号	175 页码:7
关键词	Spontaneous droplet aggregation Functional surface Hierarchical wedge-shaped zone Influencing factors Water collection
ISSN号	0927-0256
DOI	10.1016/j.commatsci.2020.109616
通讯作者	Wang, Chao(wangchao@lnm.imech.ac.cn) ; Chen, Shaohua(chenshaohua72@hotmail.com)
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.
分类号	二类
资助项目	National Natural Science Foundation of China[11872114] ; National Natural Science Foundation of China[11532013] ; National Natural Science Foundation of China[11602270] ; National Natural Science Foundation of China[11972348]
WOS关键词	WATER COLLECTION ; WETTABILITY ; GRAPHENE ; MOTION ; GRADIENTS ; TRANSPORT ; BEHAVIOR
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000519566300004
资助机构	National Natural Science Foundation of China
其他责任者	Wang, Chao ; Chen, Shaohua
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81810]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Cent South Univ, Coll Mech & Elect Engn, State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China; 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 3.Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;
推荐引用方式 GB/T 7714	Wang S,Peng ZL,Li JJ,et al. Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces[J]. COMPUTATIONAL MATERIALS SCIENCE,2020,175:7.
APA	王帅,彭志龙,李建军,杨亚政,王超,&陈少华.(2020).Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces.COMPUTATIONAL MATERIALS SCIENCE,175,7.
MLA	王帅,et al."Influencing factors of droplet aggregation on hierarchical wedge-shaped functional surfaces".COMPUTATIONAL MATERIALS SCIENCE 175(2020):7.