Pumping effect of heterogeneous meniscus formed around spherical particle
发表时间：2020-02-17
点击次数：
- 论文类型：
- 期刊论文
- 第一作者：
- Nakamura, Hayate
- 通讯作者：
- Yoshikawa, HN (reprint author), Univ Cote Azur, Inst Phys Nice, CNRS, Nice, France.; Ueno, I (reprint author), Tokyo Univ Sci, Fac Sci & Technol, Dept Mech Engn, 2641 Yamazaki, Noda, Chiba 2788510, Japan.
- 合写作者：
- Ueno, Ichiro,Ogawa, Tetsuya,Inoue, Motochika,Hori, Takuma,Mu, Lizhong,Yoshikawa, Harunori N.,Zoueshtiagh, Farzam,Dietze, Georg,Tsukahara, Takahiro
- 发表时间：
- 2020-03-07
- 发表刊物：
- JOURNAL OF COLLOID AND INTERFACE SCIENCE
- 收录刊物：
- PubMed、EI、SCIE
- 文献类型：
- J
- 卷号：
- 562
- 页面范围：
- 133-141
- ISSN号：
- 0021-9797
- 关键字：
- Dynamic wetting; Meniscus; Capillary
- 摘要：
- Hypothesis: A disturbance such as a microparticle on the pathway of a spreading droplet has shown the tremendous ability to accelerate locally the motion of the macroscopic contact line (Mu et al., 2017). Although this ability has been linked to the particle-liquid interaction, the physical mechanisms behind it are still poorly understood despite its academic interest and the scope of numerous industrial applications in need of fast wetting. Experiments: In order to better understand the mechanisms behind the particle-liquid interaction, we numerically investigate the pressure and velocity fields in the liquid film. The results are compared to experiments assessing the temporal shape variation of the liquid-film meniscus from which pressure difference around the particle is evaluated. Findings: The particle-induced acceleration of the film front depends both on the shape of the meniscus that forms around the particle foot and the liquid "reservoir" in the film that can be pumped thanks to the presence of the particle. The study validates the presence of three stages of pressure difference between the upstream and downstream regions of the meniscus around the particle, which leads to the local acceleration/deceleration of the macroscopic contact line. We indicate that asymmetric meniscus around the particle foot produces a net pressure force driving liquid and accelerating the liquid-film front. (C) 2019 Elsevier Inc. All rights reserved.
- 是否译文：
- 否
