Impact of a high-speed train of microdrops on a liquid pool

W. Bouwhuis, X. Huang, C.U. Chan, Ph.E. Frommhold, C.D. Ohl, D. Lohse, J.H. Snoeijer, D. Van Der Meer

    Research output: Contribution to journalArticleAcademicpeer-review

    22 Citations (Scopus)
    1 Downloads (Pure)


    A train of high-speed microdrops impacting on a liquid pool can create a very deep and narrow cavity, reaching depths more than 1000 times the size of the individual drops. The impact of such a droplet train is studied numerically using boundary integral simulations. In these simulations, we solve the potential flow in the pool and in the impacting drops, taking into account the influence of liquid inertia, gravity and surface tension. We show that for microdrops the cavity shape and maximum depth primarily depend on the balance of inertia and surface tension and discuss how these are influenced by the spacing between the drops in the train. Finally, we derive simple scaling laws for the cavity depth and width.

    Original languageEnglish
    Pages (from-to)850-868
    Number of pages19
    JournalJournal of Fluid Mechanics
    Publication statusPublished - 8 Mar 2016


    • Drops
    • drops and bubbles
    • microfluidics


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