Experimental research on thermocapillary migration of drops by using digital holographic interferometry
文献类型：期刊论文
| 作者 | Zhang ST; Duan L(段俐) ; Kang Q(康琦)
|
| 刊名 | EXPERIMENTS IN FLUIDS
 |
| 出版日期 | 2016 |
| 卷号 | 57期号:7页码:113 |
| 通讯作者邮箱 | kq@imech.ac.cn |
| ISSN号 | 0723-4864 |
| 通讯作者 | Kang, Q (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China. |
| 产权排序 | [Zhang, Shuoting; Duan, Li; Kang, Qi] Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China |
| 中文摘要 | The thermocapillary migration of drops in a rectangular cell, with a heated top wall and a cooled bottom wall, was investigated experimentally on the ground. The rectangular test cell was 70 mm high, with a horizontal cross section of 40 mm x 40 mm. In the present experiment, 30 cSt silicon oil was used as the continuous phase, and a water-ethanol mixture was used as the drop phase, respectively. The drops ranged in size from 1.87 to 6.94 mm in diameter and were injected into the continuous phase, where the temperature gradients ranged from 0.193 to 0.484 degrees C mm(-1). In order to measure the temperature distribution of the liquid, a digital holographic interferometry was used, which was non-contact, full-field, and in-situ. The holograms were recorded, and then the corresponding wrapped phase distributions images were numerically reconstructed. The temperature distribution of the continuous phase liquid in the cell had been obtained following the unwrapping. Also, through an algebra layer analysis, the temperature distribution around the drop during the thermocapillary migration was obtained. As a result, the drop was colder than the continuous phase liquid, and a thermal wake existed behind the drop. The influence of convective transport on the drop migration was also investigated for the Marangoni number in the range of 7-174. With the increasing of the Marangoni number, the dimensionless interface temperature difference decreased, which was caused by the convective transport enhanced results in the drop thermocapillary migration velocity becoming decreased. The data were compared with previous space experiments to explain the phenomena of the drop migration. Finally, with the increasing Marangoni numbers, the length of the thermal wake region increased, and the thermal wake region became extended. |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 分类号 | 二类 |
| 研究领域[WOS] | Engineering ; Mechanics |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1007/s00348-016-2193-x |
| 语种 | 英语 |
| WOS记录号 | WOS:000380230600003 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/59762]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 推荐引用方式 GB/T 7714 | Zhang ST,Duan L,Kang Q. Experimental research on thermocapillary migration of drops by using digital holographic interferometry[J]. EXPERIMENTS IN FLUIDS,2016,57(7):113. |
| APA | Zhang ST,段俐,&Kang Q.(2016).Experimental research on thermocapillary migration of drops by using digital holographic interferometry.EXPERIMENTS IN FLUIDS,57(7),113. |
| MLA | Zhang ST,et al."Experimental research on thermocapillary migration of drops by using digital holographic interferometry".EXPERIMENTS IN FLUIDS 57.7(2016):113. |
入库方式： OAI收割
来源：力学研究所
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