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Slip boundary conditions based on molecular kinetic theory: The critical shear stress and the energy dissipation at the liquid-solid interface
Wang FC(王奉超); Zhao YP(赵亚溥); Zhao, YP (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
Source PublicationSoft Matter
2011
Volume7Issue:18Pages:8628-8634
ISSN1744-683X
AbstractThe boundary slip and its mechanism were investigated using theoretical analysis and molecular dynamic simulations. We proposed a new slip boundary condition based on molecular kinetic theory, which was extended by the introduction of the critical shear stress, which determines the onset of the slip, and the energy dissipation near the liquid-solid interface at high shear stress. Our results revealed that the critical shear stress increases exponentially with the liquid-solid interactions. In particular, we discussed the energy dissipation contributed from the friction between the liquid layers near the interface. The results demonstrated that the momentum transfer among the liquid layers and the bulk liquid must be considered according to the wetting conditions of the solid surface, which can interpret the contradictory published results of slip behavior at high shear stress. The analytical expression of our slip boundary condition can be compared with the simulation results since it uses parameters consistent with that used in our molecular dynamic simulations. Furthermore, we suggested a dimensionless number to qualify the transition from Poiseuille-like to plug-like flow in the carbon nanotubes. These findings can enhance our understanding of the boundary slip.
KeywordFast Water Transport Carbon Nanotubes Dependent Friction Surfaces Flow Dynamics
Subject AreaChemistry ; Materials Science ; Physics ; Polymer Science
DOI10.1039/c1sm05543g
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000294447600094
WOS KeywordFAST WATER TRANSPORT ; CARBON NANOTUBES ; DEPENDENT FRICTION ; SURFACES ; FLOW ; DYNAMICS
WOS Research AreaChemistry ; Materials Science ; Physics ; Polymer Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science
Funding OrganizationThis work was jointly supported by the National Basic Research Program of China (973 Program, Grant No. 2007CB310500), the National Natural Science Foundation of China (NSFC, Grant Nos. 60936001 and 11072244) and the Shanghai Supercomputer Center.
DepartmentLNM纳/微系统力学与物理力学
Classification一类
Citation statistics
Cited Times:51[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44951
Collection非线性力学国家重点实验室
Corresponding AuthorZhao, YP (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang FC,Zhao YP,Zhao, YP . Slip boundary conditions based on molecular kinetic theory: The critical shear stress and the energy dissipation at the liquid-solid interface[J]. Soft Matter,2011,7(18):8628-8634.
APA 王奉超,赵亚溥,&Zhao, YP .(2011).Slip boundary conditions based on molecular kinetic theory: The critical shear stress and the energy dissipation at the liquid-solid interface.Soft Matter,7(18),8628-8634.
MLA 王奉超,et al."Slip boundary conditions based on molecular kinetic theory: The critical shear stress and the energy dissipation at the liquid-solid interface".Soft Matter 7.18(2011):8628-8634.
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