High-speed microdroplet impact on smooth solid surfaces

ORAL

Abstract

We present experimental observations of high-speed microdroplet impact on smooth solid surfaces (roughness $R_{RMS} \approx 1\mathrm{nm}$), using high-speed imaging up to 1 million frames per second. The ranges of the droplet size and velocity are $\mathcal{O}$(0.01) - $\mathcal{O}$(0.1) mm and $\mathcal{O}$(1)- $\mathcal{O}$(100) m/s, respectively. Droplet generation is achieved by break-up of a high-velocity microjet. The final droplet radius after impact and the development of droplet radius in time are investigated for impact of the first droplet of the droplet train. The results are compared with models available in literature.

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Authors

  • Claas Willem Visser

    University of Twente

  • Yoshiyuki Tagawa

    University of Twente

  • Nikolai Oudalov

    University of Twente

  • 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