文章基本信息

标题：Natural convection in an air filled cavity with various heat source locations
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作者：Ahmed kadhim Hussein ; Falah Hassan Naiem
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2018
卷号：9
期号：5
页码：1-20
出版社：International Energy and Environment Foundation (IEEF)
摘要：The numerical investigation of the natural convection in a vertical rectangular cavity filled with air is carried by using the finite difference method. The horizontal walls of the cavity are assumed adiabatic. While, the vertical walls are assumed partially heated. Two thermal sources were taken in this study. The hot source was installed in the left sidewall while, the cold was installed on the right sidewall. The sources localized at bottom – bottom position. The flow and thermal fields properties are computed for Rayleigh number (103 ≤ Ra ≤ 106), source lengths (0.25 ≤ Ls ≤ 0.75), and aspect ratio (1 ≤ AR ≤ 2) respectively. The results show that, when the Rayleigh number and aspect ratio increase, the fluid flow intensity in the cavity increases also. While, with changing the sources lengths by decrease in the hot source length and the increase in the cold source lengths can be used to improve the flow field. It’s found that the Nusselt number was high with installing the hot source at the top region of the left sidewall while the cold source at bottom region of the right sidewall.
关键词：Natural convection; Aspect ratio; Dimensionless heat source length;