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Effect of gravity on the stability of viscoelastic thermocapillary liquid layers
Hu KX(胡凯鑫); He M; Chen QS(陈启生); Liu R(刘荣)
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
2018-08-01
Volume123Pages:776-786
ISSN0017-9310
AbstractThermocapillary convection appears in many polymer processing operations. In order to understand the effect of gravity for its stability, three-dimensional linear stability analysis is performed for a viscoelastic fluid. The critical Marangoni number is derived as a function of Bond number, Prandtl number and elasticity. When the Prandtl number is large, the increasing of gravity effect often makes the flow more stable, and the coupling of gravity to elasticity and thermocapillary force excites many different kinds of preferred modes. For small Prandtl number, the flow is always destabilized by gravity effect. The work done by gravity becomes a new energy source for perturbation. However, it can be either positive or negative, which is not directly related to the variation of critical Marangoni number with gravity. The effect of gravity on the instability mechanism and the properties of preferred modes are demonstrated for different elasticity. (C) 2018 Elsevier Ltd. All rights reserved.
DOI10.1016/j.ijheatmasstransfer.2018.02.088
Indexed BySCI ; EI
Language英语
WOS IDWOS:000434887000065
WOS KeywordHORIZONTAL FLUID LAYER ; INCLINED TEMPERATURE-GRADIENT ; SURFACE-TENSION ; POLYMER-SOLUTION ; CONVECTION ; INSTABILITIES ; FLOW ; SUBJECT ; DRIVEN ; NUMBER
WOS Research AreaThermodynamics ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Engineering, Mechanical ; Mechanics
Funding OrganizationNational Natural Science Foundation of China(11402271 ; K.C. Wong Magna Fund in Ningbo University ; 11532015 ; U1738119)
Classification一类
Ranking3
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77511
Collection国家微重力实验室
Recommended Citation
GB/T 7714
Hu KX,He M,Chen QS,et al. Effect of gravity on the stability of viscoelastic thermocapillary liquid layers[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,123:776-786.
APA 胡凯鑫,He M,陈启生,&刘荣.(2018).Effect of gravity on the stability of viscoelastic thermocapillary liquid layers.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,123,776-786.
MLA 胡凯鑫,et al."Effect of gravity on the stability of viscoelastic thermocapillary liquid layers".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 123(2018):776-786.
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All comments (1)
陈启生
2018-08-03 12:50

第一作者:胡开鑫

 

 

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