Investigation of free surface heat transfer effect on oscillatory thermocapillary flow of high Prandtl number fluid

Material type: 文書・図像類

Author: 鴨谷, 康弘ほか

Publisher: 宇宙開発事業団

Publication date: 2002-12-27

Material Format: Digital

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Note (General)：: Oscillatory thermocapillary flow in liquid bridges of high Prandtl number fluid is investigated. The effect of heat transfer at the free surface on th...

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Material Type: 文書・図像類
Title: Investigation of free surface heat transfer effect on oscillatory thermocapillary flow of high Prandtl number fluid
Author/Editor: 鴨谷, 康弘
Wang, L.
八田, 明香
依田, 真一
Kamotani, Yasuhiro
Hatta, Sayaka
Yoda, Shinichi
Author Heading: 鴨谷, 康弘
Wang, L.
八田, 明香
依田, 真一
Kamotani, Yasuhiro
Hatta, Sayaka
Yoda, Shinichi
Publication, Distribution, etc.: 宇宙開発事業団
Publication Date: 2002-12-27
Publication Date (W3CDTF): 2002-12-27
Alternative Title: 高プラントル数流体の振動熱毛細管流に及ぼす自由表面熱伝達の影響に関する研究
Periodical title: 宇宙開発事業団技術報告: Marangoni Convection Modeling Research: Annual Report April 1, 2001-March 31, 2002 = NASDA Technical Memorandum: Marangoni Convection Modeling Research: Annual Report April 1, 2001-March 31, 2002
Pages: 23-41
ISSN (Periodical Title): ISSN : 1345-7888
Text Language Code: eng
Subject Heading: 自由表面熱伝達
Marangoni対流
温度分布
Prandtl数
熱毛細管流
振動
液橋
Marangoni数
数値シミュレーション
Biot数
無次元パラメーター
free surface heat transfer
Marangoni convection
temperature distribution
Prandtl number
thermocapillary flow
oscillation
liquid bridge
Marangoni number
numerical simulation
Biot number
dimensionless parameter
Target Audience: 一般
Note (General): Oscillatory thermocapillary flow in liquid bridges of high Prandtl number fluid is investigated. The effect of heat transfer at the free surface on the conditions for the onset of oscillations is studied experimentally. In order to vary the surface heat transfer over a wide range, the experiments are conducted in an oven. The surface heat transfer results in net heat loss or net gain depending on the oven temperature relative to the hot wall temperature. The heat loss situation is of main interest in the present work. It is shown that the critical Marangoni number (Ma(sub cr)) increases substantially with decreasing free surface heat loss. The air motion is simulated numerically in order to compute the free surface heat transfer rate. The numerical results show that the critical conditions cannot be correlated by two parameters, Ma and mean Biot number. It is shown that the S-parameter correlates the critical conditions well when the surface heat transfer is minimized. When the free surface gains heat at high oven temperature, the critical temperature difference now decreases with increasing heat gain. How the oscillation mechanism is affected by the free surface heat transfer is discussed.
資料番号: AA0045403001
レポート番号: NASDA-TMR-020026E
Access Restrictions: 限定公開
Periodical Title (NCID): AN00364784
https://ci.nii.ac.jp/ncid/AN00364784
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