Numerical simulation of Marangoni convection in consideration of free surface displacement
| Autor: | Goto, Masayuki, Ueno, Ichiro, Kawamura, Hiroshi, Yoda, Shinichi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
自由表面変形
計算格子 Marangoni対流 Marangoni convection thermocapillary flow floating zone method ハーフゾーン液橋 熱毛細管流 フローティングゾーン法 Prandtl number computational grid 計算流体力学 computational fluid dynamics 無次元数 Physics::Fluid Dynamics 数値シミュレーション half-zone liquid bridge free surface deformation Prandtl数 numerical simulation dimensionless number |
| Zdroj: | 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. :73-106 |
| ISSN: | 1345-7888 |
| Popis: | Thermocapillary-driven convection in a half-zone liquid bridge has been extensively examined hitherto. The dynamic free-surface deformation was often observed in the experiments. Influence of the deformation upon the flow in the bridge, however, have not been understood yet. The three-dimensional thermocapillary convection has been simulated numerically with taking the dynamic deformation of the free surface into account. The shape of the liquid bridge is determined by the stress balance over the surface. The computational grid is reconstructed in accordance with the dynamic surface shape deformation. The test fluid considered is Acetone (Pr = 4.4). The free surface deformation is found to be determined primarily by the pressure. A mutual relationship between the surface deformation and the pressure and other quantities is shown in the pulsating or rotating flow states. The maximum points of the deformation in the vicinity of the hot and cold disks are azimuthally twisted. 資料番号: AA0045403003 レポート番号: NASDA-TMR-020026E |
| Databáze: | OpenAIRE |
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