The present study deals with computational investigation of natural convection in a porous chamber having a copper finned heat sink and a thermally producing element of finite thickness and heat conductivity. The enclosure is cooled from the external vertical and upper horizontal walls, whilst the remaining borders are considered to be thermally insulated. Newtonian and heat-conducting liquid with temperature-dependent viscosity is assumed as a working medium. Governing equations are written in non-dimensional variables «stream function—vorticity—temperature» and they are worked out by the finite difference technique. The temperature distribution, streamlines and the dependences of the integral characteristics on the governing characteristics, such as the Darcy and Ostrogradsky numbers and geometric characteristics of the radiator have been illustrated. Presented results can be used for the development of passive cooling systems.

中文翻译：

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发热元件用多孔翅片散热片冷却系统

本研究涉及对具有铜翅片散热器和有限厚度和热导率的发热元件的多孔室中自然对流的计算研究。外壳从外部垂直壁和上部水平壁冷却，而其余边界被认为是隔热的。具有与温度相关的粘度的牛顿和导热液体被假定为工作介质。控制方程写在无量纲变量«流函数-涡度-温度»中，并通过有限差分技术计算出来。温度分布、流线和积分特性对控制特性的依赖性，例如达西数和奥斯特罗格拉茨基数以及散热器的几何特征。提出的结果可用于被动冷却系统的开发。