Droplet levitating over a moving wall: stability of a lubricating air film

ORAL

Abstract

A drop of viscous liquid may levitate when placed over a rapidly-moving inclined solid surface. Here, the droplet's weight is supported by a micrometer-scale air film that develops between the drop and the underlying solid (Sawaguchi et al., JFM 2019). This lubricating air film may develop instabilities, with capillary waves growing and propagating towards the back side of the droplet. We capture this instability experimentally and rationalize its dynamics theoretically.

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Presenters

  • Bauyrzhan Primkulov

    • Massachusetts Institute of Technology MI

Authors

  • Bauyrzhan Primkulov

    • Massachusetts Institute of Technology MI

  • Matsuda Ayumi

    • Tokyo Univ of Agri & Tech

  • Yoshiyuki Tagawa

    • Tokyo Univ of Agri & Tech
    • Tokyo University of Agriculture and Technology,

  • John W Bush

    • Massachusetts Institute of Technology MI