Drop impact on superheated surfaces

ORAL

Abstract

We let millimeter droplets impact on superheated smooth surfaces. Depending on the impact velocity and the surface temperature, the droplet either immediately boils under spray formation when it contacts the surface (``wet boiling''), or without any surface contact forms a Leidenfrost vapor layer towards the hot surface and bounces back (``gentle film boiling''), or even breaks up in the middle during that process so that it basically immediately vaporizes (``violent film boiling''). We experimentally determine the phase diagram and qualitatively account for the transitions between the different regimes.

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Authors

  • Tuan Tran

  • Erik-Jan Staat

  • Andr\'ea Prosperetti

    University of Twente, Johns Hopkins University

  • Chao Sun

    Physics of Fluids Group, University of Twente, University of Twente, The University of Twente

  • Detlef Lohse

    Physics of Fluids Group, University of Twente, Physics of Fluids, University of Twente, The Netherlands, University of Twente, NL, University of Twente, Physics of Fluids, University of Twente, The University of Twente