Reassessing water slippage in hydrophobic nanostructures

doi:10.1063/5.0030758

	Reassessing water slippage in hydrophobic nanostructures
	Zuo, Hong 1,2,3; Javadpour, Farzam 3; Deng, Shouchun 1; Jiang, Xiaofang 1,3; Li, Zhiwen 1,3; Li, Haibo 1
刊名	JOURNAL OF CHEMICAL PHYSICS
	2020-11-21
卷号	153 期号:19 页码:8
ISSN号	0021-9606
DOI	10.1063/5.0030758
英文摘要	Reported data of measured slip lengths in nanostructures span several orders of magnitude, from a few nanometers to tens of micrometers. Small roughness on surfaces caused by structural defects or thermal fluctuations dramatically reduces slippage. Tiny bubbles entrapped on rough surfaces can also affect slippage. We used an asymptotic solution and a high density-ratio pseudopotential lattice Boltzmann model to systematically study the drag resistance of a rough surface with attached bubbles. As bubbles nucleate and grow, drag resistance is slightly reduced until the tri-phase contact line reaches the edges of roughness, where bubbles with small angles substantially reduce drag resistance. As bubbles grow to become a continuous gas layer on the surface, the drag resistance greatly decreases. However, the interface deformation from flat to curved shape greatly hinders liquid flow, and the vortex structures cause a wave-like fluctuation in the effective slip length. This finding sheds light on the controversies of reported large variations in the slip length of super-hydrophobic surfaces in nanostructures, e.g., carbon nanotubes.
资助项目	China Scholarship Council's (CSC)
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000595280500001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25168]
专题	中科院武汉岩土力学所
通讯作者	Javadpour, Farzam
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Texas Austin, Jackson Sch Geosci, Bur Econ Geol, Box 10, Austin, TX 78713 USA
推荐引用方式 GB/T 7714	Zuo, Hong,Javadpour, Farzam,Deng, Shouchun,et al. Reassessing water slippage in hydrophobic nanostructures[J]. JOURNAL OF CHEMICAL PHYSICS,2020,153(19):8.
APA	Zuo, Hong,Javadpour, Farzam,Deng, Shouchun,Jiang, Xiaofang,Li, Zhiwen,&Li, Haibo.(2020).Reassessing water slippage in hydrophobic nanostructures.JOURNAL OF CHEMICAL PHYSICS,153(19),8.
MLA	Zuo, Hong,et al."Reassessing water slippage in hydrophobic nanostructures".JOURNAL OF CHEMICAL PHYSICS 153.19(2020):8.