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titleThermocapillary flow in low Pr number liquid bridge: Annual report of fluid dynamics instability research
Other TitleThermocapillary flow in low Pr number liquid bridge: Annual report of fluid dynamics instability research
Author(jpn)松本 聡; 大平 博昭; 益子 岳史; 佐々木 宏衛; 依田 英里香; 今石 宣之; 依田 眞一
Author(eng)Matsumoto, Satoshi; Ohira, Hiroaki; Mashiko, Takashi; Sasaki, Hiroei; Yoda, Erika; Imaishi, Nobuyuki; Yoda, Shinichi
Author Affiliation(jpn)宇宙航空研究開発機構 宇宙科学研究本部 ISS科学プロジェクト室; 宇宙航空研究開発機構 宇宙科学研究本部 ISS科学プロジェクト室; 宇宙航空研究開発機構 宇宙科学研究本部 ISS科学プロジェクト室; 千葉工業大学; エイ・イー・エス; 九州大学; 宇宙航空研究開発機構 宇宙科学研究本部 ISS科学プロジェクト室
Author Affiliation(eng)Japan Aerospace Exploration Agency ISS Science Project Office, Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency ISS Science Project Office, Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency ISS Science Project Office, Institute of Space and Astronautical Science; Chiba Institute of Technology; Advanced Engineering Services Co. Ltd.; Kyushu University; Japan Aerospace Exploration Agency ISS Science Project Office, Institute of Space and Astronautical Science
Issue Date2006-03-31
PublisherJapan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構
Publication date2006-03-31
Languageeng
AbstractExperimental study on thermocapillary convection of low Prandtl number fluid was carried out to estimate the mode structure after the onset of oscillatory flow. The half-zone liquid bridge of molten tin was used as a experimental configuration. In order to detect very slight temperature changes, the temperature measurement system was improved. Temperature oscillations at the interface between liquid and cold rod were obtained by several thermocouples. The first transition could be detected and the transition processes have been clarified. The mode structure appeared in a low frequency oscillation region after the onset was presumed from the phase differences among them. The mode structure was supposed to be 2 and rotation with a frequency of 0.008 Hz. Furthermore, the rotation of the temperature field was elucidated through the multipoint measurements. In addition to above experiment, the preliminary test to visualize the flow field by using ultrasonic wave was performed. The result demonstrates us to be able to visualize the internal flow filed in low Prandtl number liquid column.
DescriptionJAXA Research and Development Report
宇宙航空研究開発機構研究開発報告
Keywordsthermocapillary flow; Prandtl number; liquid bridge; oscillating flow; temperature measurement; flow distribution; flow visualization; Marangoni convection; 熱キャピラリー流; プラントル数; 液柱; 振動流れ; 温度測定; 流れ分布; 流れの可視化; マランゴニ対流
Document TypeTechnical Report
JAXA Category研究開発報告
ISSN1349-1113
SHI-NOAA0049790000
Report NoJAXA-RR-05-023E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/40588


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