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titleDevelopment of flow visualization by ultrasonic for thermocapillary convection of low Prandtl number fluid
Other TitleDevelopment of flow visualization by ultrasonic for thermocapillary convection of low Prandtl number fluid
Author(jpn)松本 聡; 益子 岳史; 大平 博昭; 依田 眞一; 佐々木 宏衛; 依田 英里香
Author(eng)Matsumoto, Satoshi; Mashiko, Takashi; Ohira, Hiroaki; Yoda, Shinichi; Sasaki, Hiroei; Yoda, Erika
Author Affiliation(jpn)宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 宇宙航空研究開発機構; 千葉工業大学; エイ・イー・エス
Author Affiliation(eng)Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Japan Aerospace Exploration Agency; Chiba Institute of Technology; Advanced Engineering Services Co. Ltd.
Issue Date2007-03-30
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
Publication date2007-03-30
Languageeng
AbstractThis paper describes an investigation for development of visualization system which aims to observe Marangoni convection in a half-zone liquid bridge of low-Prandtl number fluid of molten tin. Generally, low Prandtl number fluids (eg. molten metal and semiconductor) are opaque. So, the internal flow can not be measured by using a visible light. Therefore we employed the ultrasonic wave to track the particle position. The transducer was made by LiNbO3 single crystal as a piezoelectric element which was attached on titanium shoe. The suitable tracer to mix into the molten tin liquid bridge was examine in several point of view; density match, wettability with mother fluid, acoustic impedance and so on. The hallow Shirasu-balloon coated with Ni and Fe could be made. The feasibility test of this system was performed and the result demonstrates us to be able to visualize the internal flow filed in low Prandtl number liquid column.
DescriptionJAXA Research and Development Memorandum
宇宙航空研究開発機構研究開発資料
Keywordsultrasonic wave transducer; Marangoni convection; flow visualization; liquid bridge; liquid metal; tin; Prandtl number; temperature distribution; concentration gradient; temperature measurement; 超音波トランスデューサ; マランゴニ対流; 流れの可視化; 液柱; 液体金属; 錫; プラントル数; 温度分布; 濃度勾配; 温度測定
Document TypeTechnical Report
JAXA Category研究開発資料
ISSN1349-1121
SHI-NOAA0063889000
Report NoJAXA-RM-06-015E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/51900


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