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Numerical simulation of conjugate, turbulent mixed convection heat transfer in a vertical channel with discrete heat sources

机译:具有离散热源的垂直通道中共轭湍流混合对流换热的数值模拟

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This paper presents the results of a comprehensive numerical study to analyze turbulent mixed convection in a vertical channel with a flush-mounted discrete heat source in each channel wall. The conjugate heat transfer problem is solved to study the effect of various parameters like the thermal conductivity of the wall material (k(s)), the thermal conductivity of the flush-mounted discrete heat source (k(c)), Reynolds number (Re-s), modified Richardson number (Ri*) and the aspect ratio of the channel (AR). The standard k-epsilon turbulence model, modified by including buoyancy effects, without wall functions, has been used for the analysis. The two-dimensional governing equations are discretised on a semi-staggered, non-uniform. grid, using the finite volume method. The asymptotic computational fluid dynamics (ACFD) technique has been then applied to obtain a correlation for the non-dimensional maximum temperature theta(max) which can be used for a wide range of parameters. (c) 2006 Elsevier Ltd. All rights reserved.
机译:本文介绍了一项综合数值研究的结果,以分析垂直通道中的湍流混合对流,并在每个通道壁中安装了齐平安装的离散热源。解决了共轭传热问题,以研究各种参数的影响,例如壁材料的导热系数(k(s)),齐平安装的离散热源的导热系数(k(c)),雷诺数( Re-s),修改的Richardson数(Ri *)和通道的纵横比(AR)。分析中使用了标准的kε湍流模型,该模型通过包含浮力效应而进行了修改,而没有壁函数。二维控制方程离散在一个半交错,非均匀的位置上。网格,使用有限体积方法。然后应用了渐近计算流体动力学(ACFD)技术来获得可用于各种参数的无量纲最大温度theta(max)的相关性。 (c)2006 Elsevier Ltd.保留所有权利。

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