2012 Fiscal Year Final Research Report
Hydrodynamics and boiling phenomena of droplets impinging on hot solid
| Project/Area Number |
21560212
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
FUJIMOTO Hitoshi 京都大学, 大学院・エネルギー科学研究科, 准教授 (40229050)
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| Co-Investigator(Kenkyū-buntansha) |
TAKUDA Hirohiko 京都大学, 大学院・エネルギー科学研究科, 教授 (20135528)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 対流 / 液滴 / 沸騰 / 可視化 |
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| Research Abstract |
Deformation behavior and boiling phenomena of droplets impinging on hot solid was observed by means of a two-directional flash-photography technique using two digital still cameras and three flash units developed by the present researchers.The boiling phenomena can be roughly explained in terms of the interfacial temperature given by one-dimensional heat conduction theory and the limit of superheat of liquid.At interfacial temperatures higher than the limit of superheat, a vapor film is formed immediately after the collision. The dynamical similarity of the liquid motion is roughly obtained by the Weber number (the ratio of the inertia force to the surface tension force)alone.
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