Lanzhou University of Technology Institutional Repository (LUT_IR)
Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model | |
Wu, Feng1; Lu, Dilai1; Wang, Gang2 | |
2016-06-02 | |
发表期刊 | Numerical Heat Transfer; Part A: Applications
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ISSN | 10407782 |
卷号 | 69期号:11页码:1280-1296 |
摘要 | ABSTRACT: Steady non-Darcy natural convection in a porous cavity with sinusoidal thermal boundary condition is studied numerically by adopting the local thermal non-equilibrium (LTNE) model in this paper. The top and bottom walls of the enclosure are adiabatic, whereas the left vertical wall is partially heated and cooled by a sinusoidal temperature profile and the right vertical wall is cooled by the uniform thermal boundary condition. The results show that, compared with the uniform boundary conditions, the sinusoidal boundary conditions can enhance the heat transfer rate of a porous cavity. The values of local Nusselt numbers at the left sidewall can be enhanced by sinusoidal thermal boundary condition and the maximum absolute value of the local Nusselt number appears near the top and bottom walls of the cavity. The thermal nonequilibrium effect on natural convection in the porous cavity can be enhanced by the sinusoidal thermal boundary condition, and the absolute value of the dimensionless solid-to-fluid temperature differences decreases as the thermal conductivity ratio (γ) increases and approaches zero when γ = 10. The periodicity parameter (N) has a significant effect on the heat transfer rate of the porous cavity and the effect of periodicity parameter on heat transfer in porous cavity reduces gradually with the increase of H. © 2016, Copyright © Taylor & Francis Group, LLC. |
关键词 | Boundary conditions Natural convection Nusselt number Local Nusselt number Local thermal non-equilibrium Non-Darcy natural convection Sinusoidal temperature Thermal boundary conditions Thermal conductivity ratio Thermal non-equilibrium Thermal non-equilibrium effect |
DOI | 10.1080/10407782.2015.1127025 |
收录类别 | EI ; SCIE ; SCI |
语种 | 英语 |
资助项目 | Shaanxi Provincial Natural Science Foundation of China[2014JM2053] |
WOS研究方向 | Thermodynamics ; Mechanics |
WOS类目 | Thermodynamics ; Mechanics |
WOS记录号 | WOS:000376685400006 |
出版者 | Taylor and Francis Ltd. |
EI入藏号 | 20161902361846 |
EI主题词 | Thermal conductivity |
EI分类号 | 641.1 Thermodynamics ; 641.2 Heat Transfer |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/150226 |
专题 | 兰州理工大学 |
通讯作者 | Wu, Feng; Wang, Gang |
作者单位 | 1.NW Univ Xian, Sch Chem Engn, Taibai North Rd 229, Xian 710069, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R China |
通讯作者单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Wu, Feng,Lu, Dilai,Wang, Gang. Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model[J]. Numerical Heat Transfer; Part A: Applications,2016,69(11):1280-1296. |
APA | Wu, Feng,Lu, Dilai,&Wang, Gang.(2016).Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model.Numerical Heat Transfer; Part A: Applications,69(11),1280-1296. |
MLA | Wu, Feng,et al."Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model".Numerical Heat Transfer; Part A: Applications 69.11(2016):1280-1296. |
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