Laminar and turbulent natural convection in the annulus between horizontal concentric cylinders
Laminar and turbulent natural convection in the annulus between horizontal concentric cylinders
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DOI：
10.1115/1.3245178
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发表时间：
1982-11
影响因子：
--
通讯作者：
B. Farouk;S. Güçeri
中科院分区：
文献类型：
--
作者：
B. Farouk;S. Güçeri
给出了两个水平同心圆柱体在不同恒温条件下环空内稳态二维自然对流的数值解。在瑞利数（基于间隙宽度L）为105时，得到了层流情况的解。给出了瑞利数范围为106 ~ 107的紊流结果。应用k-ε湍流模型得到了结果。浮力对湍流结构的影响也被考虑在内。层流和湍流两种情况下的结果都与现有的实验数据和文献中的其他解相吻合。所给出的结果均为外筒直径与内筒直径之比为2.6。
Numerical solutions are presented for the steady-state, two-dimensional natural convection in the annulus between two horizontal concentric cylinders which are held at different constant temperatures. Solutions for the laminar case are obtained up to Rayleigh number (based on gap width, L) of 105. Turbulent flow results are presented for the Rayleigh number range of 106–107. the k-ε turbulence model has been applied to obtain the results. Buoyancy effects on the turbulence structure are also accounted for. The results for both the laminar and turbulent cases are in good agreement with available experimental data and other solutions in the literature. All results presented are for the outer cylinder diameter to inner cylinder diameter ratio of 2.6.