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. | |
Source Publication | JOURNAL OF FLUID MECHANICS |
2013-02-01 | |
Volume | 716Pages:171-188 |
ISSN | 0022-1120 |
Abstract | 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. |
Keyword | Contact Lines Drops Micro-/nano-fluid Dynamics |
Subject Area | 物理力学 |
DOI | 10.1017/jfm.2012.539 |
URL | 查看原文 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000314422800022 |
WOS Keyword | MICROPILLAR ARRAYS ; MOLECULAR-DYNAMICS ; INTERIOR CORNER ; VISCOUS-FLOW ; LIQUIDS ; WATER |
WOS Research Area | Mechanics ; Physics |
WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
Funding Organization | 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). |
Department | LNM纳/微系统力学与物理力学 |
Classification | 一类 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/47023 |
Collection | 非线性力学国家重点实验室 |
Corresponding Author | Zhao, YP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
Recommended Citation 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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