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

Donghyun Yoon, Jin Bong Ha, Yoen Kyung Bahk, Takahiro Arakawa, Shuichi Shoji, Jeung Sang Go

    Research output: Contribution to journalArticle

    55 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)87-90
    Number of pages4
    JournalLab on a Chip - Miniaturisation for Chemistry and Biology
    Volume9
    Issue number1
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Secondary flow
    Microchannels
    Velocity distribution
    Sorting
    Numerical analysis
    Flow of fluids
    Demonstrations
    Trajectories

    ASJC Scopus subject areas

    • Biochemistry
    • Chemistry(all)
    • Bioengineering
    • Biomedical Engineering

    Cite this

    Size-selective separation of micro beads by utilizing secondary flow in a curved rectangular microchannel. / Yoon, Donghyun; Ha, Jin Bong; Bahk, Yoen Kyung; Arakawa, Takahiro; Shoji, Shuichi; Go, Jeung Sang.

    In: Lab on a Chip - Miniaturisation for Chemistry and Biology, Vol. 9, No. 1, 2009, p. 87-90.

    Research output: Contribution to journalArticle

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