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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 PublicationJOURNAL OF FLUID MECHANICS
2013-02-01
Volume716Pages:171-188
ISSN0022-1120
AbstractDynamic 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.
KeywordContact Lines Drops Micro-/nano-fluid Dynamics
Subject Area物理力学
DOI10.1017/jfm.2012.539
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000314422800022
WOS KeywordMICROPILLAR ARRAYS ; MOLECULAR-DYNAMICS ; INTERIOR CORNER ; VISCOUS-FLOW ; LIQUIDS ; WATER
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding OrganizationThis 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).
DepartmentLNM纳/微系统力学与物理力学
Classification一类
Citation statistics
Cited Times:63[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47023
Collection非线性力学国家重点实验室
Corresponding AuthorZhao, 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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