Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers

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	Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers
	Wu ZB(武作兵); Wu ZB(武作兵)
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2017
通讯作者邮箱	wuzb@lnm.imech.ac.cn
卷号	105 页码:704-711
关键词	Interfacial tension Thermocapillary migration of a droplet Large Marangoni numbers Microgravity
ISSN号	0017-9310
通讯作者	Wu, ZB (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Wu, ZB (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
产权排序	[Wu, Zuo-Bing] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Wu, Zuo-Bing] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
中文摘要	In this paper, thermocapillary migration of a planar droplet at moderate and large Marangoni numbers is investigated analytically and numerically. By using the dimension-analysis method, the thermal diffusion time scale is determined as the controlling one of the thermocapillary droplet migration system. During this time, the whole thermocapillary migration process is fully developed. By using the front-tracking method, the steady/unsteady states as the terminal ones at moderate/large Marangoni numbers are captured in a longer time scale than the thermal diffusion time scale. In the terminal states, the instantaneous velocity fields in the unsteady migration process at large Marangoni numbers have the forms of the steady ones at moderate Marangoni numbers. However, in view of the former instantaneous temperature fields, the surface tension of the top surface of the droplet gradually becomes, the main component of the driving force on the droplet after the inflection point appears. It is different from that the surface tension of the bottom surface of the droplet is the main component of the driving force on the droplet for the latter ones. The physical mechanism of thermocapillary droplet migration can be described as the significance of the thermal convection around the droplet is higher than/just as the thermal conduction across the droplet at large/moderate Marangoni numbers. (C) 2016 Elsevier Ltd. All rights reserved.
分类号	一类
类目[WOS]	Thermodynamics ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Engineering ; Mechanics
关键词[WOS]	Interfacial tension ; Thermocapillary migration of a droplet ; Large Marangoni numbers ; Microgravity
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.10.042
语种	英语
WOS记录号	WOS:000389556800065
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59979]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wu ZB(武作兵)
推荐引用方式 GB/T 7714	Wu ZB,Wu ZB. Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017,105:704-711.
APA	武作兵,&Wu ZB.(2017).Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,105,704-711.
MLA	武作兵,et al."Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 105(2017):704-711.