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Levitation mechanism of impacting nanodroplet on heated wall

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Title: Levitation mechanism of impacting nanodroplet on heated wall
Authors: Tabe, Hirofumi Browse this author
Kobayashi, Kazumichi Browse this author →KAKEN DB
Yaguchi, Hisao Browse this author →KAKEN DB
Fujii, Hiroyuki Browse this author →KAKEN DB
Watanabe, Masao Browse this author →KAKEN DB
Keywords: Molecular dynamics simulation
Leidenfrost effect
Intermolecular force
Three-phase contact line
Internal flow
Issue Date: Apr-2020
Publisher: Elsevier
Journal Title: International Journal of Thermal Sciences
Volume: 150
Start Page: 106203
Publisher DOI: 10.1016/j.ijthermalsci.2019.106203
Abstract: Levitation of a droplet after impacting on a high-temperature wall is well known as the Leidenfrost effect. In this study, we conducted a molecular dynamics (MD) simulation to elucidate the mechanism of nanodroplet levitation and to investigate the relation between the levitation mechanism and liquid–solid intermolecular force. We found that the impacting nanodroplet levitated from its edge on the heated wall. Analyses on velocity fields inside the droplet indicated that an upward velocity at the edge of the nanodroplet was caused by an internal flow. The high wall temperature or strong liquid–solid intermolecular force caused an intensive evaporation near the three-phase contact line before levitation occurred, and this intensive evaporation yielded a large internal flow within the nanodroplet.
Rights: © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
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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