SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Double-diffusive buoyancy convection in a square cuboid with horizontal temperature and concentration gradients
[Chen, Zhi-Wu; Zhan, Jie-Min; Luo, Ying-Ying] Sun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China; [Li, Yok-Sheung] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China; Cai, Shuqun] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; cejmzhan@gmail.com
2013
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN0017-9310
Volume60Pages:422-431
AbstractDouble-diffusive buoyancy convection in a three-dimensional (3D) square cuboid is studied in the present paper. Both the temperature and solute concentration gradients are applied horizontally. Direct numerical simulations are carried out for Rayleigh number 10 <= Ra <= 2 x 10(5), buoyancy ratio -2 <= R-rho <= 0, and Lewis number 2 <= Le <= 1000. Different front-rear symmetric solutions are found, and the flow structures are essentially three-dimensional. As each of the parameters is varied, typical pitchfork bifurcation is encountered, given appropriate disturbances. The resultant asymmetric solution presents a diagonal flow configuration. Different solution branches are denoted in terms of Nusselt and Sherwood numbers and corresponding two-dimensional (2D) model results are also presented to depict the deviations. In some parameter ranges, the 2D model significantly over-predicts the heat and mass transfer rates. More importantly, it fails to predict any unsteadiness of the flow, even when the corresponding 3D solution is chaotic. The onset of convection from the quiescent equilibrium state is also considered. (C) 2013 Elsevier Ltd. All rights reserved.
DepartmentLTO
KeywordDouble-diffusive Convection Buoyancy Instability Pitchfork Bifurcation
Subject AreaThermodynamics ; Engineering, Mechanical ; Mechanics
Funding OrganizationThe work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019).
URL查看原文
Language英语
Funding OrganizationThe work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019). ; The work described in this paper was jointly supported by a grant from The Hong Kong Polytechnic University (Project No. G-U666) and the National Natural Science Foundation of China (No. 40906006 and No. 41025019).
WOS IDWOS:000317534500047
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/10915
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorcejmzhan@gmail.com
Recommended Citation
GB/T 7714
[Chen, Zhi-Wu,Zhan, Jie-Min,Luo, Ying-Ying] Sun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China,et al. Double-diffusive buoyancy convection in a square cuboid with horizontal temperature and concentration gradients[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2013,60:422-431.
APA [Chen, Zhi-Wu,Zhan, Jie-Min,Luo, Ying-Ying] Sun Yat Sen Univ, Dept Appl Mech & Engn, Guangzhou 510275, Guangdong, Peoples R China,[Li, Yok-Sheung] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China,Cai, Shuqun] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China,&cejmzhan@gmail.com.(2013).Double-diffusive buoyancy convection in a square cuboid with horizontal temperature and concentration gradients.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,60,422-431.
MLA [Chen, Zhi-Wu,et al."Double-diffusive buoyancy convection in a square cuboid with horizontal temperature and concentration gradients".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 60(2013):422-431.
Files in This Item:
File Name/Size DocType Version Access License
Double-diffusive buo(2161KB) 开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.