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Early stage of nanodroplet impact on solid wall

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Title: Early stage of nanodroplet impact on solid wall
Authors: Kobayashi, Kazumichi Browse this author →KAKEN DB
Konno, Kazuki Browse this author
Yaguchi, Hisao Browse this author
Fujii, Hiroyuki Browse this author →KAKEN DB
Sanada, Toshiyuki Browse this author
Watanabe, Masao Browse this author →KAKEN DB
Keywords: Fluid drops
Intermolecular forces
Molecular dynamics
Issue Date: Mar-2016
Publisher: American Institute of Physics (AIP)
Journal Title: Physics of Fluids
Volume: 28
Issue: 3
Start Page: 032002
Publisher DOI: 10.1063/1.4942874
Abstract: In this study, we investigated nanodroplet spreading at the early stage after the impact using molecular dynamics simulations by changing the magnitude of the intermolecular force between the liquid and wall molecules. We showed that the droplet deformation after the impact greatly depends on the intermolecular force. The temporal evolution of the spreading diameters was measured by the cylindrical control volume for several molecular layers in the vicinity of the wall. At the early stage of the nanodroplet impact, the normalized spreading radius of the droplet is proportional to the square root of the normalized time, tˆ. This result is understood by the geometrical consideration presented by Rioboo et al. [“Time evolution of liquiddrop impact onto solid, dry surfaces,” Exp. Fluids 33, 112–124 (2002)]. In addition, we found that as the intermolecular force between the liquid and wall becomes stronger, the normalized spreading diameter of the first molecular layer on the wall remains less dependent on the impact velocity. Furthermore, the time evolution of the droplet spreading changes from tˆ√ to logtˆ with time.
Rights: Copyright 2016 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Fluids 28 032002 (2016) 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: 小林 一道

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