| Item type |
テクニカルレポート / Technical Report(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
Experimental works for intermediate and low Pr: Transition to oscillatory Marangoni convection in liquid bridges of intermediate prandtl number |
|
言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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主題Scheme |
Other |
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主題 |
マランゴニ対流 |
| キーワード |
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主題Scheme |
Other |
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主題 |
液体ブリッジ |
| キーワード |
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主題Scheme |
Other |
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主題 |
振動 |
| キーワード |
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主題Scheme |
Other |
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主題 |
プラントル数 |
| キーワード |
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主題Scheme |
Other |
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主題 |
温度勾配 |
| キーワード |
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主題Scheme |
Other |
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主題 |
3次元モデル |
| キーワード |
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主題Scheme |
Other |
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主題 |
アセトン |
| キーワード |
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主題Scheme |
Other |
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主題 |
メチルアルコール |
| キーワード |
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主題Scheme |
Other |
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主題 |
熱電対 |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Marangoni convection |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
liquid bridge |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
oscillation |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Prandtl number |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
temperature gradient |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
three dimensional model |
| キーワード |
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言語 |
en |
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主題Scheme |
Other |
|
主題 |
acetone |
| キーワード |
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|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
methyl alcohol |
| キーワード |
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|
言語 |
en |
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主題Scheme |
Other |
|
主題 |
thermocouple |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18gh |
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資源タイプ |
technical report |
| その他のタイトル |
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その他のタイトル |
中間プラントル数の液体ブリッジにおける振動マランゴニ対流への転移 |
| 著者 |
川路, 正裕
大坪, 史明
Simic, Sanja
依田, 真一
Kawaji, Masahiro
Otsubo, Fumiaki
Simic, Sanja
Yoda, Shinichi
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| 著者所属 |
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宇宙開発事業団 |
| 著者所属 |
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エイ・イー・エス |
| 著者所属 |
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University of Toronto Dept. of Chemical Eng. and Applied Chem. |
| 著者所属 |
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|
宇宙開発事業団 |
| 著者所属（英） |
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|
en |
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National Space Development Agency of Japan |
| 著者所属（英） |
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|
en |
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Advanced Engineering Services Co. Ltd. |
| 著者所属（英） |
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|
en |
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University of Toronto Department of Chemical Engineering and Applied Chemistry |
| 著者所属（英） |
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en |
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National Space Development Agency of Japan |
| 出版者 |
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出版者 |
宇宙開発事業団 |
| 出版者（英） |
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出版者 |
National Space Development Agency of Japan (NASDA) |
| 書誌情報 |
宇宙開発事業団技術報告: Marangoni Convection Modeling Research: Annual Report April 1, 1999 - March 31, 2000
en : NASDA Technical Memorandum: Marangoni Convection Modeling Research: Annual Report April 1, 1999 - March 31, 2000
p. 73-114,
発行日 2000-09-29
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| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
Marangoni convection experiments have been conducted with acetone (Pr = 4.3) and methanol (Pr = 6.8) liquid bridges to investigate the flow structures and temperature fields during transition from steady to oscillatory convection in a half floating zone. The disk diameters of 5.0 mm and 10.0 mm were used for both fluids and the liquid bridge height was changed from 1.5 mm to 4.5 mm, covering aspect ratios from 0.3 up to 1.6. Various advanced measurement techniques were employed to yield detailed experimental data useful for both understanding the mechanism responsible for transition as well as verifying linear stability analysis and three-dimensional numerical simulation predictions. In order to reduce the surface evaporation rate, a quartz tube was fitted around the liquid bridge for both fluids. The liquid bridge shape data were obtained for both fluids covering a wide range of volume ratios for each aspect ratio and disk diameter. For acetone, the transition from steady to oscillatory convection was found to occur at disk temperature differences of 1.3 to 2.3 K, and liquid temperature fluctuations with amplitudes of 0.02 to 0.1 K were detected. For methanol, oscillatory flow appeared at disk temperature differences ranging from 1.6 to 4.3 K. For acetone, the transition was also accompanied by the appearance of an azimuthal component of surface velocity. At the same time, the toroidal vortex started to expand and contract in size, and the radial flow field started to rotate. Although the surface displacement was measured, surface oscillations could not be detected probably because of an insufficient driving force arising from small temperature differences. The critical Marangoni numbers for acetone were found to be higher than the values extrapolated from existing data, due to the effects of evaporation and added heat loss from the liquid surface. On the other hand, the critical Marangoni numbers for methanol showed good agreement with the existing data for a similar Prandtl number. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1345-7888 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AN00364784 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: AA0010763003 |
| レポート番号 |
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内容記述タイプ |
Other |
|
内容記述 |
レポート番号: NASDA-TMR-000006E |
10763003.pdf (7.5 MB)
