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Effect of capillary ratio on thermal-solutal capillary-buoyancy convection in a shallow annular pool with radial temperature and concentration gradients
Chen, Jie-Chao1,2; Wu, Chun-Mei1; Li, You-Rong1; Yu, Jia-Jia1
2017-06-01
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume109Pages:367-377
AbstractIn order to understand the effect of capillary ratio on the thermal-solutal capillary-buoyancy convection in an annular pool subjected to simultaneous radial thermal and solutal gradients, a series of three-dimensional direct numerical simulations have been carried out. The working fluid was the toluene/n-hexane mixture fluid with the Prandtl number of 5.54 and the Schmidt number of 142.8. The capillary ratio R-sigma varied from -0.8 to 0.2. Results show that the flow is axisymmetric and steady at small thermocapillary Reynolds number. Four types of such two-dimensional steady flow, i.e., counter-clockwise unicellular flow, clockwise unicellular flow, flows with two separate cells stratified horizontally and vertically, appear with the variations of capillary ratio and thermocapillary Reynolds number. With the further increase of thermocapillary Reynolds number, two-dimensional steady flow bifurcates firstly to three-dimensional steady flow at the first critical thermocapillary Reynolds number, then to three-dimensional oscillatory flow at the second critical thermocapillary Reynolds number. When the threedimensional oscillatory flow appears, the temperature and concentration fluctuations on the free surface are indicated as either the coexistence of "hydro-thermal wave" and "hydro-solutal wave", or the "vibrating straight spokes". A reverse transition from periodic flow to steady flow is encountered. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordNumerical Simulation Flow Pattern Thermal-solutal Capillary Convection Capillary Ratio Annular Pool
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijheatmasstransfer.2017.02.008
WOS Subject ExtendedThermodynamics ; Engineering ; Mechanics
WOS KeywordMARANGONI CONVECTION ; SURFACE-TENSION ; INTERFACE SHAPE ; GROWTH ; LAYER ; FLOW ; MELT ; DRIVEN ; FLUID
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51406019) ; Chongqing University Postgraduates' Innovation Project(CYB15015)
WOS SubjectThermodynamics ; Engineering, Mechanical ; Mechanics
WOS IDWOS:000400227300033
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14170
Collection中国科学院广州能源研究所
Affiliation1.Chongqing Univ, Coll Power Engn, Minist Educ, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400044, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Chen, Jie-Chao,Wu, Chun-Mei,Li, You-Rong,et al. Effect of capillary ratio on thermal-solutal capillary-buoyancy convection in a shallow annular pool with radial temperature and concentration gradients[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017,109:367-377.
APA Chen, Jie-Chao,Wu, Chun-Mei,Li, You-Rong,&Yu, Jia-Jia.(2017).Effect of capillary ratio on thermal-solutal capillary-buoyancy convection in a shallow annular pool with radial temperature and concentration gradients.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,109,367-377.
MLA Chen, Jie-Chao,et al."Effect of capillary ratio on thermal-solutal capillary-buoyancy convection in a shallow annular pool with radial temperature and concentration gradients".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 109(2017):367-377.
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