ADVANCES IN THE RESEARCH ON “INERTIAL FOCUS OF PARTICLES” AND ITS APPLICATION IN MICROFLUIDICS

WANG Qikun; SUN Ren

doi:10.6052/1000-0992-12-052

Volume 42 Issue 6

Nov. 2012

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WANG Qikun, SUN Ren. ADVANCES IN THE RESEARCH ON “INERTIAL FOCUS OF PARTICLES” AND ITS APPLICATION IN MICROFLUIDICS[J]. Advances in Mechanics, 2012, 42(6): 692-703. doi: 10.6052/1000-0992-12-052

Citation:

WANG Qikun, SUN Ren. ADVANCES IN THE RESEARCH ON “INERTIAL FOCUS OF PARTICLES” AND ITS APPLICATION IN MICROFLUIDICS[J]. Advances in Mechanics, 2012, 42(6): 692-703. doi: 10.6052/1000-0992-12-052

WANG Qikun, SUN Ren. ADVANCES IN THE RESEARCH ON “INERTIAL FOCUS OF PARTICLES” AND ITS APPLICATION IN MICROFLUIDICS[J]. Advances in Mechanics, 2012, 42(6): 692-703. doi: 10.6052/1000-0992-12-052

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ADVANCES IN THE RESEARCH ON “INERTIAL FOCUS OF PARTICLES” AND ITS APPLICATION IN MICROFLUIDICS

doi: 10.6052/1000-0992-12-052

WANG Qikun^{1
,
,},
SUN Ren²

1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2 Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China

Funds: The project was supported by the National Natural Science Foundation of China (10872130) and the Special Foundation of Specialties Leading to Doctor Degree for Chinese Institution of Higher Education (20113120120003).

More Information

Corresponding author: WANG Qikun
Received Date: 2012-04-05
Rev Recd Date: 2012-09-12
Publish Date: 2012-11-25

Abstract

Abstract

When a flow with randomly dispersed small particles enters a straight pipe at low Reynolds numbers, the particles may migrate to an annulus centered at the axis of the pipe after a migration distance. This migration is called as ‘Inertial Focus of Particles’, which indicates that in the creeping flow there are transverse forces exerted on the immersed particles apart from viscous drags. It is the transverse force that results in the phenomenon, and it is usually regarded as an effect of the inertial force of the flow field on the particles. Recently, the phenomenon is attracting the attention of more and more researchers. Further research on it will not only reveal the interesting dynamic behaviors of both particles and colloids in a micro-channel and organisms in a blood vessel, but also assist us in the exploitation of such separation technology with high efficiency and low energy consumption. This paper summarizes recent advances in this area and presents some suggestions for future research.
- inertial focus of particles, laminar flow with low reynolds number, internal flow in Channels, solid-liquid flow, microfluidic control

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References(41)

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