Spatiotemporal resonances in mixing of open viscous fluids

Fridolin Okkels, Patrick Tabeling

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    Abstract

    In this Letter, we reveal a new dynamical phenomenon, called "spatiotemporal resonance," which is expected to take place in a broad range of viscous, periodically forced, open systems. The observation originates from a numerical and theoretical analysis of a micromixer, and is supported by preliminary experimental observations. The theoretical model nicely matches the numerical results, which again is supported by the experiment. Because of the general nature of the phenomenon, this phenomenon is not limited to microsystems. Because of the resonances, a slight tuning of the control parameters makes the mixer enhance the mixing, or suppress it, enhancing interfacial diffusion instead.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume92
    Issue number3
    Pages (from-to)038301
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2004

    Bibliographical note

    Copyright (2004) American Physical Society.

    Keywords

    • DRIVEN
    • MIXER
    • FLOWS
    • CHAOTIC ADVECTION

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