Investigation of free surface heat transfer effect and oscillation mechanisms for thermocapillary flow of high Prandtl number fluid

Material type: 文書・図像類

Author: 鴨谷, 康弘ほか

Publisher: 宇宙航空研究開発機構

Publication date: 2005-03-31

Material Format: Digital

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Note (General)：: The effect of free surface heat transfer on oscillatory thermocapillary flow in liquid bridges of high Prandtl number (Pr) fluids is investigated expe...

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Material Type: 文書・図像類
Title: Investigation of free surface heat transfer effect and oscillation mechanisms for thermocapillary flow of high Prandtl number fluid
Author/Editor: 鴨谷, 康弘
Wang, A.
依田, 真一
Kamotani, Yasuhiro
Yoda, Shinichi
Author Heading: 鴨谷, 康弘
Wang, A.
依田, 真一
Kamotani, Yasuhiro
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: 高プラントル数流体の熱キャピラリー流に対する自由表面熱伝達効果と振動機構の研究
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: 11-24
ISSN (Periodical Title): ISSN : 1349-1113
Text Language Code: eng
Subject Heading: 熱伝達
振動
熱キャピラリー流
高プラントル数流体
液体流
液柱
マランゴニ対流
数値シミュレーション
heat transfer
oscillation
thermocapillary flow
high Prandtl number fluid
liquid flow
liquid bridge
Marangoni convection
numerical simulation
Target Audience: 一般
Note (General): The effect of free surface heat transfer on oscillatory thermocapillary flow in liquid bridges of high Prandtl number (Pr) fluids is investigated experimentally as well as numerically. It has been found that the critical condition is very sensitive to the free surface heat transfer under certain conditions but relatively insensitive under other conditions. In this work it is shown that this sensitivity difference may be related to the difference in the oscillation mechanism. Several oscillation mechanisms have been proposed in the past for oscillatory thermocapillary flows in liquid bridges of high Prandtl fluids, mainly hydrothermal wave type instability and a non-linear mechanism involving dynamic free surface deformation. It is discussed here that the range of Marangoni number, where the flow is found to become oscillatory in many experiments for high Pr fluids, is too low for the flow to become unstable by the hydrothermal wave instability mechanism, or any linear instability mechanism. Instead, non-linear mechanisms are needed where the driving force is altered continuously by some means. In order to get this conclusion, the past work is summarized and some new results are presented herein.
資料番号: AA0048708001
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