Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers | |
Wu ZB(武作兵) | |
发表期刊 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER |
2017 | |
卷号 | 105期号:6页码:704-711 |
ISSN | 0017-9310 |
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. |
关键词 | Interfacial Tension Thermocapillary Migration Of a Droplet Large Marangoni Numbers Microgravity |
DOI | 10.1016/j.ijheatmasstransfer.2016.10.042 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000389556800065 |
关键词[WOS] | Interfacial Tension ; Thermocapillary Migration Of a Droplet ; Large Marangoni Numbers ; Microgravity |
WOS研究方向 | Thermodynamics ; Engineering ; Mechanics |
WOS类目 | Thermodynamics ; Engineering, Mechanical ; Mechanics |
项目资助者 | National Natural Science Foundation of China [11172310, 11472284] |
课题组名称 | LNM微纳米流体力学 |
论文分区 | 一类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/59979 |
专题 | 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. Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017,105,6,:704-711. |
APA | 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(6),704-711. |
MLA | Wu ZB."Terminal states of thermocapillary migration of a planar droplet at moderate and large Marangoni numbers".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 105.6(2017):704-711. |
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