Dynamic surface deformation of cylindrical bridge of high Prandtl number fluid in oscillatory thermocapillary convection: Tspi measurement and G-jitter effect

• Material Type: 文書・図像類
• Title: Dynamic surface deformation of cylindrical bridge of high Prandtl number fluid in oscillatory thermocapillary convection: Tspi measurement and G-jitter effect
• Author/Editor: 西野, 耕一; Li, X.; 金島, 雄大; 依田, 真一; Nishino, Koichi; Kanashima, Yuta; Yoda, Shinichi
• Author Heading: 西野, 耕一; Li, X.; 金島, 雄大; 依田, 真一; Nishino, Koichi; Kanashima, Yuta; Yoda, Shinichi
• Publication, Distribution, etc.: 宇宙航空研究開発機構
• Publication Date: 2005-03-31
• Publication Date (W3CDTF): 2005-03-31
• Alternative Title: 熱キャピラリー対流振動による高プラントル数流体円柱の動的表面変形:Tspi測定とG-ジッタ効果
• Periodical title: 宇宙航空研究開発機構研究開発報告 = JAXA Research and Development Report: Marangoni Convection Modeling Research, 2003-2004
• No. or year of volume/issue: JAXA-RR-04-027E
• Volume: JAXA-RR-04-027E
• Pages: 25-48
• ISSN (Periodical Title): ISSN : 1349-1113
• Text Language Code: eng
• Subject Heading: 動的表面変形; 振動; 熱キャピラリー対流; スペックルパターン干渉法; 数値シミュレーション; 液柱; マランゴニ対流; dynamic surface deformation; oscillation; thermocapillary convection; speckle pattern interferometry; numerical simulation; liquid bridge; Marangoni convection
• Target Audience: 一般
• Note (General): This report describes experimental studies conducted at Yokohama National University during 2003 JFY as a part of the Project Research on Marangoni Convection of National Space Development Agency of Japan (NASDA) (now JAXA). The work consists of (1) the development of a new measuring method for Dynamic Surface Deformation (DSD, hereafter) of cylindrical bridge of high Prandtl number fluid and (2) the study of g-jitter effect on DSD in a simulated g-jitter environment. In the first work, a technique based on Temporal Speckle Pattern Interferometry (TSPI) is developed to make two-dimensional measurement of DSD in oscillatory thermocapillary convection. The technique is designed to have a resolution of better than 0.1 um and be applicable to a curved liquid surface. Its performance is verified through a series of measurements targeting a flat mirror, a glass rod and a liquid bridge, all of which show dynamical surface displacement or deformation. The success of the measurement is due to the special phase-unwrapping algorithm devised for the measurement of oscillatory surface displacement or deformation. In the second work, effects of g-jitter on the measurement of DSD caused by the oscillatory thermocapillary convection in a liquid bridge are studied experimentally. A vibration table driven by a piezoelectric actuator is constructed to generate g-jitters of realistic amplitude and frequency spectra. A micro-imaging displacement meter is used to measure DSD in the presence of g-jitter. It is shown that the natural DSD in the oscillatory state of thermocapillary convection is well separated in the frequency domain from that caused by harmonic and non-harmonic g-jitters. It is concluded that the DSD measurement in the future ISS experiment is feasible even in the presence of g-jitter there.; 資料番号: AA0048708002; レポート番号: JAXA-RR-04-027E
• Access Restrictions: 限定公開
• Periodical Title (NCID): AA1192675X; https://ci.nii.ac.jp/ncid/AA1192675X
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ