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Molecular dynamics simulation of micro-Poiseuille flow the liquid argon in nanoscale
Xu, JL; Zhou, ZQ; Xu, XD
2004
发表期刊INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
卷号14期号:5-6页码:664-688
摘要The molecular dynamics simulation of micro-Poiseuille flow for liquid argon in nanoscale was performed in non-dimensional unit system with the control parameters of channel size, coupling parameters between solid wall and liquid particles, and the gravity force. The molecular forces are considered not only among the liquid molecules, but also between the solid wag and liquid molecules. The simulation shows that a larger gravity force produces a larger shear rate and a higher velocity distribution. In terms of the gravity force, there are three domain regions each with distinct flow behaviors: free molecule oscillation, coupling and gravity force domain regions. Stronger fluid/wall interactions can sustain a larger coupling region, in which the flow is controlled by the balance of the intermolecular force and the gravity force. Strong surface interaction leads to small slip lengths and the slip lengths are increased slightly with increasing the shear rate. Weak surface interaction results in higher slip lengths and the slip lengths are dramatically decreased with increasing the shear rate. The viscosities are nearly kept constant (Newton flow behavior) if the non-dimensional shear rate is below 2.0. At higher non-dimensional shear rate larger than 2.0, the viscosities have a sharp increase with increasing the shear rate, and the non-Newton flow appears.
文章类型Article
关键词Liquid Flow Simulation Gases
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1108/09615530410539973
研究领域[WOS]Thermodynamics ; Mathematics ; Mechanics
收录类别SCI
语种英语
WOS类目Thermodynamics ; Mathematics, Interdisciplinary Applications ; Mechanics
WOS记录号WOS:000223933200005
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10200
专题中国科学院广州能源研究所
作者单位Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China
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Xu, JL,Zhou, ZQ,Xu, XD. Molecular dynamics simulation of micro-Poiseuille flow the liquid argon in nanoscale[J]. INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW,2004,14(5-6):664-688.
APA Xu, JL,Zhou, ZQ,&Xu, XD.(2004).Molecular dynamics simulation of micro-Poiseuille flow the liquid argon in nanoscale.INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW,14(5-6),664-688.
MLA Xu, JL,et al."Molecular dynamics simulation of micro-Poiseuille flow the liquid argon in nanoscale".INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW 14.5-6(2004):664-688.
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