Dissolutive flow in nanochannels: transition between plug-like and Poiseuille-like

doi:10.1007/s10404-018-2146-1

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	Dissolutive flow in nanochannels: transition between plug-like and Poiseuille-like
	Miao Q ; Yuan QZ(袁泉子); Zhao YP(赵亚溥)
刊名	MICROFLUIDICS AND NANOFLUIDICS
	2018-12-01
卷号	22 期号:12 页码:Ar-141
关键词	Dissolutive flow Nanochannels Transport properties Molecular dynamics simulation
ISSN号	1613-4982
DOI	10.1007/s10404-018-2146-1
英文摘要	Dynamic properties of dissolutive flow in nanochannels were investigated by molecular dynamics simulations. It turned out that the liquid flow pattern changes greatly after the dissolution effect taken into consideration. Liquid inside the channel has a plug-like velocity profile when the dissolubility is low, whereas a Poiseuille-like flow was observed as the dissolubility increases. By introducing the dissolution term to molecular kinetic theory, we explained the physical mechanisms of velocity transition. During which a modified dimensionless Galilei number was proposed to describe the effect of main forces. The results showed that in pressure-driven flow, when the dissolubility is low, the dominant dissipation is the viscous dissipation and the theoretical model of insolubility is acceptable. However, as the dissolubility increases, the dissolving dissipation takes priority, which results in the velocity profiles becoming Poiseuille-like. In addition, we analyzed the evolution of fluid density, number of dissolved solid particles and concentration distribution of solute. The liquid density varying from layered oscillation to uniform distribution was obtained, which can be described by a critical number. The analysis of solute concentration helps to establish the scaling relation among the dissolution rate, convection velocity, and diffusion coefficient. These findings not only help to understand the physical mechanisms of dissolutive flow but also help to control and optimize the flow patterns in dissoluble channels.
分类号	二类
URL标识	查看原文
WOS关键词	MOLECULAR-DYNAMICS SIMULATION ; CARBON NANOTUBES ; CHEMICAL DISSOLUTION ; LIQUID SLIP ; WATER ; TRANSPORT ; SYSTEM ; CLASSIFICATION ; WETTABILITY ; MECHANISMS
WOS研究方向	Nanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Fluids & Plasmas
语种	英语
WOS记录号	WOS:000450945400002
资助机构	National Natural Science Foundation of China (NSFC) [11722223, 11672300, 11872363, 51861145314] ; CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-JSC019] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040401]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78157]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.[Miao, Qing 2.Yuan, Quanzi 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Miao Q,Yuan QZ,Zhao YP. Dissolutive flow in nanochannels: transition between plug-like and Poiseuille-like[J]. MICROFLUIDICS AND NANOFLUIDICS,2018,22(12):Ar-141.
APA	Miao Q,袁泉子,&赵亚溥.(2018).Dissolutive flow in nanochannels: transition between plug-like and Poiseuille-like.MICROFLUIDICS AND NANOFLUIDICS,22(12),Ar-141.
MLA	Miao Q,et al."Dissolutive flow in nanochannels: transition between plug-like and Poiseuille-like".MICROFLUIDICS AND NANOFLUIDICS 22.12(2018):Ar-141.