Unsteady natural convection and heat transfer in a differentially heated cavity with a fin for high Rayleigh numbers
Unsteady natural convection and heat transfer in a differentially heated cavity with a fin for high Rayleigh numbers
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DOI：
10.1016/j.applthermaleng.2016.01.115
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发表时间：
2016-04
影响因子：
6.4
通讯作者：
Jia Ma;F. Xu
中科院分区：
文献类型：
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作者：
Jia Ma;F. Xu
在Rayleigh数为108 ~ 1011，Prandtl数为6.63的范围内，对不同位置肋片的差热腔内非稳态自然对流换热进行了数值研究.结果表明，自然对流的发展从启动是依赖于瑞利数和翅片的位置。描述了腔内自然对流的瞬态特性。一个简单的尺度分析适用于鳍周围的瞬态流和非定常流的瑞利数和鳍的位置的依赖关系进行量化。通过腔的热传递进行检查。
Unsteady natural convection and heat transfer in a differentially heated cavity with a fin at different positions are numerically investigated for a wide range of high Rayleigh numbers from 108to 1011and a Prandtl number of Pr = 6.63. The results show that the development of natural convection from the start-up is dependent on the Rayleigh number and the fin position. The transient features of natural convection flows in the cavity are described. A simple scaling analysis is applied for the transient flow around the fin and the dependence of the unsteady flow on the Rayleigh number and the fin position is quantified. Heat transfer through the cavity is examined.