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taisei arihiro
✈︎ Born January 21, 1997
✈︎ Enrolled in Department of Mechanical and Aeronautical Engineering, Kyushu University in 2016
✈︎ Entered Kyushu University Graduate School of Aerospace Engineering in 2020
STUDY introduction
静止液膜上における単一液滴の挙動は工業上の様々な場面で見られる重要な素過程であり、数多くの研究がなされているが、複雑な現象を内在しており、未だ十分な理解は得られていない。膜の厚さは塗料などが散布されるに伴って、数ミクロンから数百ミクロンの範囲で変化していく。他研究において、液滴が静かに液膜に乗った後、吸収されるまでにかかる時間が液膜直径に依存することが分かっている。そこで、本研究では液膜厚さに着目して、液膜厚さが液膜上での液滴の挙動に及ぼす影響について調査していく。
〜The behavior of a single droplet on a stationary liquid film is an important elementary process that is seen in various industrial scenes, and many studies have been conducted, but there are complex phenomena inherent and it is still not fully understood. Has not been obtained. The thickness of the film changes in the range of several microns to several hundreds of microns as the paint is sprayed. In other studies, it has been found that the time taken for a droplet to gently drop on a liquid film and then be absorbed depends on the liquid film diameter. Therefore, in this study, we focus on the liquid film thickness and investigate the influence of the liquid film thickness on the behavior of the liquid droplet on the liquid film.〜
Target phenomenon
液滴をハイスピードカメラで撮影すると液滴が液膜上に綺麗に乗ってぴょんぴょん跳ねる面白い現象が起こる。上の動画は液膜厚さが薄い場合、下の動画は厚い場合で撮影しており、液体には水を使用しています。薄い場合と厚い場合の違いとして、液滴が液膜に吸収されるまでにかかるステップ回数、一度吸収されて2番目にできる液滴の大きさが異なっています。
〜When a droplet is shot with a high-speed camera, an interesting phenomenon occurs in which the droplet rides neatly on the liquid film and bounces. The above video is taken when the liquid film thickness is thin and the below video is thick and Water is used as the liquid. The difference between the thin case and the thick case is that the number of steps required for the droplet to be absorbed by the liquid film and the size of the droplet that is once absorbed and becomes the second droplet are different.〜
Achievement
2020年12月18日：日本液体微粒化学会 ”単一液滴と様々な厚さの液膜における連鎖的合体過程の可視化計測 ”