Experimental Study On Liquid Free Surface In Buoyant-Thermocapillary Convection
文献类型：期刊论文
| 作者 | Duan L(段俐) ; Kang Q(康琦); Hu WR(胡文瑞)
|
| 刊名 | Chinese Physics Letters
 |
| 出版日期 | 2008 |
| 页码 | 1347-1350 |
| 通讯作者邮箱 | kq@imech.ac.cn |
| 关键词 | Instabilities Deformation Waves Flow |
| ISSN号 | 0256-307X |
| 通讯作者 | Duan, L (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab CAS, Beijing 100080, Peoples R China. |
| 中文摘要 | We investigate the surface deformations of buoyant-thermocapillary convection in a rectangular cavity clue to gravity and temperature gradient between the two sidewalls. The cavity is 52mm x 42mm in horizontal cross section, the thickness of liquid layer h is changed from 2.5mm to 6.5mm. Surface deformations of h = 3.5mm and 6.0mm are discussed and compared. Temperature difference is increased gradually, and the flow in the liquid layer will change from stable convection to unstable convection. Two kinds of optical diagnostic system with image processor are developed for study of the kinetics of buoyant-thermocapillary convection, they give out the information of liquid free surface. The quantitative results are calculated by Fourier transform and correlation analysis, respectively. With the increasing temperature gradient, surface deformations calculated are more declining. It is interesting phenomenon that the inclining directions of the convections in thin and thick liquid layers are different. For a thin layer, the convection is mainly controlled by thermocapillary effect. However, for a thick layer, the convection is mainly controlled by buoyancy effect. The surface deformation theoretically analysed is consistent with our experimental results. The present experiment proves that surface deformation is related to temperature gradient and thickness of the liquid layer. In other words, surface deformation lies on capillary convection and buoyancy convection. |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | INSTABILITIES ; DEFORMATION ; WAVES ; FLOW |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255153000050 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26066]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Duan L,Kang Q,Hu WR. Experimental Study On Liquid Free Surface In Buoyant-Thermocapillary Convection[J]. Chinese Physics Letters,2008:1347-1350. |
| APA | 段俐,康琦,&胡文瑞.(2008).Experimental Study On Liquid Free Surface In Buoyant-Thermocapillary Convection.Chinese Physics Letters,1347-1350. |
| MLA | 段俐,et al."Experimental Study On Liquid Free Surface In Buoyant-Thermocapillary Convection".Chinese Physics Letters (2008):1347-1350. |
入库方式： OAI收割
来源：力学研究所
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