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Hidden prompt splashing by corona splashing at drop impact on a smooth dry surface

Taku Ashida, Masao Watanabe, Kazumichi Kobayashi, Hiroyuki Fujii, and Toshiyuki Sanada
Phys. Rev. Fluids 5, 011601(R) – Published 15 January 2020
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Abstract

We present the experimental evidence of prompt splashing due to surface roughness at drop impact on a dry smooth surface, by suppressing corona splashing due to the surrounding gas. Prompt splashing occurs during a very early stage of the impact process, and it cannot be suppressed by reducing the gas pressure even to 0.8 kPa. We evaluate the conditions under which corona splashing hides prompt splashing at atmospheric conditions. We also demonstrate the importance of the distinction of two events, i.e., prompt splashing occurs and it can be clearly distinguished.

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  • Received 13 September 2019
  • Revised 1 December 2019

DOI:https://doi.org/10.1103/PhysRevFluids.5.011601

©2020 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Fluid Dynamics

Authors & Affiliations

Taku Ashida, Masao Watanabe*, Kazumichi Kobayashi, and Hiroyuki Fujii

  • Division of Mechanical and Space Engineering, Hokkaido University, Sapporo 060-8628, Japan

Toshiyuki Sanada

  • Department of Mechanical Engineering, Shizuoka University, Hamamatsu 432-8561, Japan

  • *masao.watanabe@eng.hokudai.ac.jp

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Vol. 5, Iss. 1 — January 2020

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