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Wetting failure in the early stage of water drop impact on a smooth solid surface

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Title: Wetting failure in the early stage of water drop impact on a smooth solid surface
Authors: Adachi, Ryunosuke Browse this author
Kobayashi, Kazumichi Browse this author →KAKEN DB
Fujii, Hiroyuki Browse this author →KAKEN DB
Sanada, Toshiyuki Browse this author
Watanabe, Masao Browse this author →KAKEN DB
Issue Date: 22-Jun-2022
Publisher: AIP Publishing
Journal Title: Physics of fluids
Volume: 34
Issue: 6
Start Page: 62116
Publisher DOI: 10.1063/5.0096813
Abstract: A water drop impacting a dry solid surface can eject a thin liquid sheet, which is forced to expand on the surface to wet the solid surface. Wetting failure, which produces defects in applications based on the impact of drops, including coating, cooling, cleaning, and printing, may occur with a sufficiently large liquid-sheet velocity. However, the exact onset of wetting failure when a drop impacts the surface has yet to be determined. Therefore, we examine the dependence of rim instability immediately after liquid-sheet ejection on the static contact angle of the solid surface at the instant of water drop impact. This study is the first attempt to solve this problem and is made possible only by using an ultra-high-speed camera. We revealed that wetting failure can occur by investigating the rim instability of the liquid sheet.
Rights: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Ryunosuke Adachi, Kazumichi Kobayashi, Hiroyuki Fujii, Toshiyuki Sanada, and Masao Watanabe, "Wetting failure in the early stage of water drop impact on a smooth solid surface", Physics of Fluids 34, 062116 (2022) and may be found at
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡部 正夫

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