Size-selective separation of micro beads by utilizing secondary flow in a curved rectangular microchannel

This paper presents a microscale benefit of a secondary flow obtained in a curved rectangular microchannel, which is generally unfavorable and negligible in conventional fluid flow. We have demonstrated the separation and sorting of micro beads by their size using secondary flow. The physical mechan...

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Veröffentlicht in:Lab on a chip 2009-01, Vol.9 (1), p.87-90
Hauptverfasser: Yoon, Dong Hyun, Ha, Jin Bong, Bahk, Yoen Kyung, Arakawa, Takahiro, Shoji, Shuichi, Go, Jeung Sang
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container_start_page 87
container_title Lab on a chip
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creator Yoon, Dong Hyun
Ha, Jin Bong
Bahk, Yoen Kyung
Arakawa, Takahiro
Shoji, Shuichi
Go, Jeung Sang
description This paper presents a microscale benefit of a secondary flow obtained in a curved rectangular microchannel, which is generally unfavorable and negligible in conventional fluid flow. We have demonstrated the separation and sorting of micro beads by their size using secondary flow. The physical mechanism occurring in the size-selective separation was explained based on the numerical analysis of the characteristic velocity distribution on the cross-sectional plane normal to the main flow stream. The dynamic trajectories of micro beads of different sizes and materials are visualized and compared for the experimental demonstration. We also discuss the effects of both the shape uniformity of the micro beads and the inlet condition on the size-selective separation.
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title Size-selective separation of micro beads by utilizing secondary flow in a curved rectangular microchannel
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