Experimental research on thermocapillary migration of drops by using digital holographic interferometry

doi:10.1007/s00348-016-2193-x

IMECH-IR > 微重力重点实验室

	Experimental research on thermocapillary migration of drops by using digital holographic interferometry
	Zhang ST; Duan L(段俐); Kang Q(康琦); Kang, Q (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China.
发表期刊	EXPERIMENTS IN FLUIDS
	2016
卷号	57 期号:7 页码:113
ISSN	0723-4864
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.
DOI	10.1007/s00348-016-2193-x
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000380230600003
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
项目资助者	This research study was funded by the National Natural Science Foundation of China (Grant No. 11372328), by the Strategic Priority Research Program on Space Science, the Chinese Academy of Sciences: SJ-10 Recoverable Scientific Experiment Satellite (Grant Nos. XDA04020405 and XDA04020202-05), and by China Manned Space Engineering program. The authors wish to thank the team led by Professor Jianlin Zhao of Northwestern Polytechnical University for providing assistance in using the digital holographic interferometer.
课题组名称	NML微重力实验流体力学
论文分区	二类
力学所作者排名	False
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59762
专题	微重力重点实验室
通讯作者	Kang, Q (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Zhang ST,Duan L,Kang Q,et al. 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,&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.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
a2016-056.pdf（2243KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载