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Unsteady conjugate natural convection in a square enclosure filled with a porous medium

机译:在充满多孔介质的方形外壳中的非稳态共轭自然对流

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Mathematical simulation of unsteady natural convection modes in a square cavity filled with a porous medium having finite thickness heat-conducting walls with local heat source in conditions of heterogeneous heat exchange with an environment at one of the external boundaries has been carried out. Numerical analysis was based on Darcy-Forchheimer model in dimensionless variables such as a stream function, a vorticity vector and a temperature. The special attention was given to analysis of Rayleigh number effect Ra = 10~4,10~5,10~6, of Darcy number effect Da = 10~(-5),10~(-4),10~(-3), ∞, of the transient factor effect 0 < ι < 1000 and of the heat conductivity ratio k_(2.1) = 3.7 × 10~(-2),5.7 × 10~(-4),6.8 × 10~(-5) on the velocity and temperature fields. The influence scales of the defining parameters on the average Nusselt number have been detected.
机译:在与外部边界之一处的环境进行异质热交换的条件下,已经进行了在方孔中进行非稳态自然对流模式的数学模拟,该方孔中填充了具有有限厚度的导热壁且带有局部热源的多孔介质。数值分析是基于Darcy-Forchheimer模型的无量纲变量(例如流函数,涡度矢量和温度)进行的。特别注意分析瑞利数效应Ra = 10〜4,10〜5,10〜6,达西数效应Da = 10〜(-5),10〜(-4),10〜(-3 ),∞,瞬变因子效应0 <ι<1000和热导率k_(2.1)= 3.7×10〜(-2),5.7×10〜(-4),6.8×10〜(-5 )在速度和温度场上。已检测到定义参数对平均努塞尔数的影响程度。

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