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Title:
Thermocapillary effect on the absolute and convective instabilities of film flows down a fibre
Author: Liu R(刘荣); Ding ZJ(丁子敬); Zhu ZQ(朱志强)
Source: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Issued Date: 2017-09-01
Volume: 112, Pages:918-925
Abstract: We consider the motion of a gravity-driven flow down a uniformly heated vertical fibre. This flow exhibits rich dynamics including the formation of droplets, or beads, driven by a Rayleigh-Plateau mechanism modified by the presence of gravity as well as the thermocapillarity at the interface. A spatio-temporal stability analysis is performed to investigate the effect of thermocapillarity (Marangoni effect) on the convective/absolute instability (Cl/AI) characteristics of the problem. We also performed a numerical simulation of Eq. (30) on the nonlinear evolution of the film to connect the breakup behaviours with the Cl/AI characteristics. Our numerical results showed that for various Marangoni number (Ma), breakup of the film mainly occurs in the AI regime. With the increase of Ma, the film has a tendency to break up into droplets due to the enhancement of the absolute instability. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword: Film flow ; Marangoni effect ; Absolute and convective instabilities
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1016/j.ijheatmasstransfer.2017.05.030
DOC Type: Article
WOS Subject: Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS Subject Extended: Thermodynamics ; Engineering ; Mechanics
WOS Keyword Plus: VERTICAL FIBER ; DROP FORMATION ; VISCOUS BEADS
WOS ID: WOS:000404198600081
ISSN: 0017-9310
Funder: National Natural Science Foundation of China(11102211||11302236||11532015)
Department: NML流动稳定性与复杂流动
First Institution (Yes or Not): false
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Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60628
Appears in Collections:国家微重力实验室_期刊论文

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Recommended Citation:
Liu R,Ding ZJ,Zhu ZQ. Thermocapillary effect on the absolute and convective instabilities of film flows down a fibre[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017-09-01,112:918-925.
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