Indexed by:
期刊论文
First Author:
Mu, Lizhong
Correspondence Author:
Ueno, I (reprint author), Univ Tokyo Sci, Fac Sci & Technol, Dept Mech Engn, Chiba 2788510, Japan.; Yoshikawa, HN (reprint author), Univ Cote Azur, CNRS, Lab JA Dieudonne, UMR 7351, F-06108 Nice 02, France.
Co-author:
Kondo, Daichi,Inoue, Motochika,Kaneko, Toshihiro,Yoshikawa, Harunori N.,Zoueshtiagh, Farzam,Ueno, Ichiro
Date of Publication:
2017-11-01
Journal:
JOURNAL OF FLUID MECHANICS
Included Journals:
Scopus、SCIE、EI
Document Type:
J
Volume:
830
ISSN No.:
0022-1120
Key Words:
capillary flows; contact lines; drops
Abstract:
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.
Translation or Not:
no
