Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model

doi:10.1080/10407782.2015.1127025

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	Numerical analysis of natural convection in a porous cavity with the sinusoidal thermal boundary condition using a thermal nonequilibrium model
	Wu, Feng 1; Lu, Dilai 1; Wang, Gang 2
刊名	Numerical Heat Transfer; Part A: Applications
	2016-06-02
卷号	69 期号:11 页码:1280-1296
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
ISSN号	10407782
DOI	10.1080/10407782.2015.1127025
英文摘要	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.
WOS研究方向	Thermodynamics ; Mechanics
语种	英语
出版者	Taylor and Francis Ltd.
WOS记录号	WOS:000376685400006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150226]
专题	兰州理工大学
作者单位	1.School of Chemical Engineering, Northwest University, Xi’an, China; 2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; Gansu, China
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.