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Microsystem Technologies

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27-09-2016 | Technical Paper

Experimental investigation of slip velocity and settling distribution of micro-particles in converging–diverging microchannel

Authors: Farhud Shirinzadeh, Mohammad Hassan Saidi, Alireza Davari

Published in: Microsystem Technologies | Issue 8/2017

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Abstract

An experimental test bed based on single particle tracking techniques is employed in order to investigate the velocity domain, slip velocity, and settling distribution of micro-particles in low-Reynolds number poiseuille flow in converging–diverging microchannel. Three-dimensional velocity domain of particles are studied in the presence of walls and compared with the particle-free fluid. The results show that the velocity of particles moving near the side walls of microchannel decreases about 30 % compared to those moving at the centerline. Furthermore, the effects of converging–diverging geometry on sedimentation of micro-particles are considered. The results show an average decrease of about 40 % in sedimentation of particles among the total particles in converging–diverging channels which is one of the main advantages of these channels in comparison with the straight types.

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Title: Experimental investigation of slip velocity and settling distribution of micro-particles in converging–diverging microchannel
Authors: Farhud Shirinzadeh
Mohammad Hassan Saidi
Alireza Davari
Publication date: 27-09-2016
Publisher: Springer Berlin Heidelberg
Published in: Microsystem Technologies / Issue 8/2017
Print ISSN: 0946-7076
Electronic ISSN: 1432-1858
DOI: https://doi.org/10.1007/s00542-016-3139-1

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