Mixing enhancement by internal circulation flow using liquid-liquid slug flow in microreactors

Wiroon Tanthapanichakoon, Kazuo Matsuyama, Nobuaki Aoki, Kazuhiro Mae

    研究成果: Conference contribution

    抄録

    Mixing characteristics inside a microfluidic liquid slug using the Computational Fluid Dynamics (CFD) simulations are reported. Slug-based microfluidics offers rapid mixing by internal circulation and transport with narrow residence time distribution, making it suitable for precise reaction and mixing operations. The simulation results show that the circulation flow occurs in the slug and stagnant regions exist in the front and tail parts and in the center of recirculation vortices. This circulation flow greatly reduces mixing time as compared with the mixing time when mixing is driven by only molecular diffusion. The results also provide insights into the influences of operating parameters on slug-based mixing rates. Based on the simulation results, the modified Peclet number, Pe = Usds2/lD, is proposed for designing mixing in liquid slugs. A novel method using Pe to estimate mixing rates and design liquid slugs to obtain desired mixing rates is discussed and confirmed experimentally. In conclusion, design of microfluidic liquid slug for measuring kinetics of fast reactions and mixing operations is made possible by realizing instant mixing and narrowed residence time distribution.

    本文言語English
    ホスト出版物のタイトルTopical Conference on Applications of Micro-Reactor Engineering 2006, Held at the 2006 AIChE Spring National Meeting
    出版社AIChE
    ページ275-281
    ページ数7
    ISBN(電子版)9781604235258
    出版ステータスPublished - 2006 1 1
    イベントTopical Conference on Applications of Micro-Reactor Engineering 2006, Held at the 2006 AIChE Spring National Meeting - Orlando, United States
    継続期間: 2006 4 232006 4 27

    出版物シリーズ

    名前Topical Conference on Applications of Micro-Reactor Engineering 2006, Held at the 2006 AIChE Spring National Meeting

    Other

    OtherTopical Conference on Applications of Micro-Reactor Engineering 2006, Held at the 2006 AIChE Spring National Meeting
    CountryUnited States
    CityOrlando
    Period06/4/2306/4/27

    ASJC Scopus subject areas

    • Process Chemistry and Technology
    • Industrial and Manufacturing Engineering

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