DC Electrokinetic Particle Transport in an L-Shaped Microchannel

Title
DC Electrokinetic Particle Transport in an L-Shaped Microchannel
Author(s)
스즈첸Ye Ai[Ye Ai]Seungkyung Park[Seungkyung Park]Junjie Zhu[Junjie Zhu]Xiangchun Xuan[Xiangchun Xuan]Ali Beskok[Ali Beskok]
Keywords
TRANSIENT ELECTROPHORETIC MOTION; DIRECT-CURRENT-DIELECTROPHORESIS; SPHERICAL-PARTICLE; RECTANGULAR MICROCHANNEL; SEPARATION; FORCE; NANOTUBE; SIMULATIONS; DEPENDENCE; BOUNDARY
Issue Date
201002
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.26, no.4, pp.2937 - 2944
Abstract
Electrokinetic transport of particles through an L-shaped microchannel under DC electric fields is theoretically and experimentally investigated. The emphasis is placed on the direct current (DC) dielectrophoretic (DEP) effect arising from the interactions between the induced spatially nonuniform electric Field around the corner and the dielectric particles. A transient multiphysics model is developed in all arbitrary Lagrangian-Eulerian (ALE) framework, which comprises the Navier-Stokes equations for the fluid flow and the Laplace equation for the electrical potential. The predictions of the DEP-induced particle trajectory shift in the L-shaped microchannel are in quantitative agreement with the obtained experimental results. Numerical Studies also show that the DEP effect call alter the angular velocity and even the direction of the particle's rotation. Further parametric Studies suggest that the L-shaped microfluidic channel may be utilized to focus and separate particles by size via the induced DEP effect.
URI
http://hdl.handle.net/YU.REPOSITORY/22902http://dx.doi.org/10.1021/la902711x
ISSN
0743-7463
Appears in Collections:
공과대학 > 기계공학부 > Articles
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