Roughness and cavitations effects on electro-osmotic flows in rough   microchannels using the lattice Poisson-Boltzmann methods

doi:10.1016/j.jcp.2007.05.001

CORC > 北京大学 > 工学院

	Roughness and cavitations effects on electro-osmotic flows in rough microchannels using the lattice Poisson-Boltzmann methods
	Wang, Moran ; Wang, Jinku ; Chen, Shiyi
刊名	计算物理学杂志
	2007
关键词	roughness and cavitation electro-osmotic flow lattice Poisson-Boltzmann method microfluidics ELECTROKINETIC TRANSPORT VELOCITY PROFILES LIQUID FLOW SIMULATION EQUATION MODEL CHANNELS DEVICES SYSTEMS
DOI	10.1016/j.jcp.2007.05.001
英文摘要	This paper investigates the effects of roughness and cavitations in microchannels on the electro-osmotic flow behaviors using the Lattice Poisson-Boltzmarm methods which combined one lattice evolution method for solving the non-linear Poisson-Boltzmann equation for electric potential distribution with the other lattice evolution method for solving the Navier-Stokes equations for fluid flow. The boundary conditions are correctly treated for consistency between the both. The results show that for the electro-osmotic flows in homogeneously charged rough channels, the flow rate does not vary with the roughness height or the interval space monotonically. The flow rate varies slightly with the roughness height or even increases a little when the roughness is very small, and then decreases when the roughness height is larger than 5% channel width. The flow rate decreases first and then increase with the roughness interval space. An interval space at twice roughness width makes the flow rate minimum. For the heterogeneously charged rough channel, the flow rate increases with the roughness surface potential at a super-linear rate. For the electro-osmotic flows in microchannels with cavitations, the flow rate change little with the cavitations depth when the depth value is very low and decreases sharply when the depth is greater than 3% channel width. The flow rate trends to be a constant when the cavitations are very deep. The flow rate decreases with the cavitations width but increases with the cavitations interval. (C) 2007 Elsevier Inc. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000249936500038&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Computer Science, Interdisciplinary Applications; Physics, Mathematical; SCI(E); 61; ARTICLE; 1; 836-851; 226
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249699]
专题	工学院
推荐引用方式 GB/T 7714	Wang, Moran,Wang, Jinku,Chen, Shiyi. Roughness and cavitations effects on electro-osmotic flows in rough microchannels using the lattice Poisson-Boltzmann methods[J]. 计算物理学杂志,2007.
APA	Wang, Moran,Wang, Jinku,&Chen, Shiyi.(2007).Roughness and cavitations effects on electro-osmotic flows in rough microchannels using the lattice Poisson-Boltzmann methods.计算物理学杂志.
MLA	Wang, Moran,et al."Roughness and cavitations effects on electro-osmotic flows in rough microchannels using the lattice Poisson-Boltzmann methods".计算物理学杂志 (2007).