2017年11月
Sharp acceleration of a macroscopic contact line induced by a particle
JOURNAL OF FLUID MECHANICS
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- 巻
- 830
- 号
- 開始ページ
- R1-1
- 終了ページ
- R1-12
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1017/jfm.2017.627
- 出版者・発行元
- CAMBRIDGE UNIV PRESS
Wetting of a planar solid substrate is investigated in the presence of a macroscopic particle in the complete wetting regime. A drop of silicone oil spreads on the substrate and its macroscopic edge is incident on the particle at the late stage of spreading. The drop-particle interaction is observed in detail by shadowgraph and interferometry. Although the spreading drop edge is pinned by the particle for a short time, a sharp acceleration occurs when the liquid starts wetting the extra surface area offered by the particle and forming a meniscus. This process yields a net gain in spreading speed. A theoretical model based on the classical wetting dynamics dictated by Cox's law is developed. It predicts that the capillary energy of the meniscus gives rise to a rapid motion of the liquid edge, showing good agreement with the dynamics observed in the experiments.
- リンク情報
- ID情報
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- DOI : 10.1017/jfm.2017.627
- ISSN : 0022-1120
- eISSN : 1469-7645
- Web of Science ID : WOS:000412196700001