Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface

doi:10.1017/jfm.2012.539

IMECH-IR > 非线性力学国家重点实验室

	Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface
	Yuan QZ(袁泉子); Zhao YP(赵亚溥); Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	JOURNAL OF FLUID MECHANICS
	2013-02-01
卷号	716 页码:171-188
ISSN	0022-1120
摘要	Dynamic wetting of a droplet on lyophilic pillars was explored using a multiscale combination method of experiments and molecular dynamics simulations. The excess lyophilic area not only provided excess driving force, but also pinned the liquid around the pillars, which kept the moving contact line in a dynamic balance state every period of the pillars. The flow pattern and the flow field of the droplet on the pillar-arrayed surface, influenced by the concerted effect of the liquid-solid interactions and the surface roughness, were revealed from the continuum to the atomic level. Then, the scaling analysis was carried out employing molecular kinetic theory. Controlled by the droplet size, the density of roughness and the pillar height, two extreme regimes were distinguished, i.e. R similar to t(1/3) for the rough surface and R similar to t(1/7) for the smooth surface. The scaling laws were validated by both the experiments and the simulations. Our results may help in understanding the dynamic wetting of a droplet on a pillar-arrayed lyophilic substrate and assisting the future design of pillar-arrayed lyophilic surfaces in practical applications.
关键词	Contact Lines Drops Micro-/nano-fluid Dynamics
学科领域	物理力学
DOI	10.1017/jfm.2012.539
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000314422800022
关键词[WOS]	MICROPILLAR ARRAYS ; MOLECULAR-DYNAMICS ; INTERIOR CORNER ; VISCOUS-FLOW ; LIQUIDS ; WATER
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
项目资助者	This work was jointly supported by the National Natural Science Foundation of China (NSFC, Grant 11202213 and 11072244), the Key Research Program of the Chinese Academy of Sciences (Grant KJZD-EW-M01) and the Instrument Developing Project of the Chinese Academy of Sciences (Grant Y2010031).
课题组名称	LNM纳/微系统力学与物理力学
论文分区	一类
引用统计	被引频次：98[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47023
专题	非线性力学国家重点实验室
通讯作者	Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Yuan QZ,Zhao YP,Zhao, YP . Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface[J]. JOURNAL OF FLUID MECHANICS,2013,716:171-188.
APA	Yuan QZ,Zhao YP,&Zhao, YP .(2013).Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface.JOURNAL OF FLUID MECHANICS,716,171-188.
MLA	Yuan QZ,et al."Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface".JOURNAL OF FLUID MECHANICS 716(2013):171-188.

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