The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel

doi:10.1016/j.molliq.2020.112460

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	The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel
	Yao, Shuting 1,2,3; Wang, Jiansheng 1,2; Liu, Xueling 1,2; Jiao, Yu 1,2
刊名	Journal of Molecular Liquids
	2020-03-01
卷号	301
关键词	Flow of fluids Hydrophilicity Hydrophobicity Molecular dynamics Nanostructures Phase interfaces Quay walls Slip forming Surface topography Velocity Wetting Hydrodynamic resistance Hydrophilic channels Hydrophobic substrate Interface slip Interfacial resistances Molecular dynamics methods Nano channels Non-uniform wettability
ISSN号	01677322
DOI	10.1016/j.molliq.2020.112460
英文摘要	The flow of argon liquid in an asymmetric nanochannel with smooth and rough wall is investigated by molecular dynamics method. Considering the relationships of related factors which include characteristic dimensions, the number and the dense arrangement pattern of nanostructure, the effects of surface topography on fluid flow and interface slip are probed. The results show that the variation of the surface topography height has a significant influence on the fluid flow and interface slip. However, the effect of the variation of topography width is greatly related to the number and dense arrangement pattern of nanostructure. Surface topography causes an increase in interfacial resistance and more reduction in velocity slip at the rough wall, which even results in the forming of sticky boundary condition. The effect of non-uniform interface wettability of rough wall on the flow behavior and slip at the solid–liquid interface is investigated as well. The results show that the influence of non-uniform interface wettability on the flow in the hydrophobic channel is more obvious than that in the hydrophilic channel. Hydrophobic substrate with hydrophobic nanostructures has a smaller interfacial hydrodynamic resistance than that with hydrophilic nanostructures, which makes the average velocity and velocity slip become greater. Obviously, non-uniform interfacial wettability strengthens the effect of surface topography on the fluid flow and interface slip. It is possible to achieve effective velocity slip and obtain drag reduction by applying the non-uniform wettability of nanostructures under the same surface topography. © 2020 Elsevier B.V.
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000517659700080
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115238]
专题	石油化工学院
作者单位	1.Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, MOE, School of Mechanical Engineering, Tianjin University, Tianjin; 300350, China 2.Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, School of Mechanical Engineering, Tianjin University, Tianjin; 300350, China; 3.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Yao, Shuting,Wang, Jiansheng,Liu, Xueling,et al. The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel[J]. Journal of Molecular Liquids,2020,301.
APA	Yao, Shuting,Wang, Jiansheng,Liu, Xueling,&Jiao, Yu.(2020).The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel.Journal of Molecular Liquids,301.
MLA	Yao, Shuting,et al."The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel".Journal of Molecular Liquids 301(2020).