Natural convection in enclosures with localized heating from below and symmetrical cooling from sides
Natural convection in enclosures with localized heating from below and symmetrical cooling from sides
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DOI：
10.1108/09615530010338196
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发表时间：
2000-01-01
影响因子：
4.2
通讯作者：
Yang, WJ
中科院分区：
文献类型：
--
作者：
Aydin, O;Yang, WJ
对二维矩形外壳中的空气自然对流进行了数值研究，该外壳具有从下方局部加热和从侧面对称冷却的功能。局部加热由位于底壁中心的热源模拟，并考虑无量纲热源长度的四个不同值：1/5、2/5、3/5和4/5。获得瑞利数值从 10(3) 到 10(6) 的解。局部结果以流线图和等温线图以及加热壁上局部努塞尔数的变化的形式呈现。最后，下壁加热部分的平均努塞尔数随着瑞利数的增加而增加。 Ra，或无量纲热源厚度，epsilon。
Natural convection of air in a two-dimensional, rectangular enclosure with localized heating from below and symmetrical cooling from the sides has been numerically investigated. Localized heating is simulated by a centrally located heat source on the bottom wall, and four different values of the dimensionless heat source length, 1/5, 2/5, 3/5 and 4/5 are considered. Solutions are obtained for Rayleigh number values from 10(3) to 10(6). Local results are presented in the form of streamline and isotherm plots as well as the variation of local Nusselt number on the heated wall. Finally, the average Nusselt number at the heated part of the lower wall, was shown to increase with an increase the Rayleigh number. Ra, or of the,nondimensional heat source thickness, epsilon.