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首页> 外文会议>International Symposium on Heating, Ventilation and Air Conditioning >Effect of Rayleigh numbers on natural convection and heat transfer with thermal radiation in a cavity partially filled with porous medium
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Effect of Rayleigh numbers on natural convection and heat transfer with thermal radiation in a cavity partially filled with porous medium

机译：瑞利数对腔体中腔内热辐射自然对流和热传递的影响

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In this paper, the effects of Rayleigh numbers on natural convection and heat transfer with thermal radiation in a cavity partially filled with a porous medium have been studied numerically. The governing equations for the momentum and heat transfer in both free fluid and porous medium were solved by the finite element method. The radiative heat transfer is calculated by making use of the radiosity of the surfaces that assumed to be grey. Comparisons with experimental and numerical results in the literature have been carried out. Effects of Rayleigh number on natural convection and heat transfer in both free fluid and porous medium were analyzed. It was found that Rayleigh numbers can significantly change the temperature fields in both the regions of free flow and porous medium. The mean temperature at the interface decreases and the temperature gradients are created on the upper two corners of the porous medium region as Ra increases.
机译：在本文中，已经在数值上进行了数值在部分填充有多孔介质的空腔中与热辐射的自然对流和热传递的影响。通过有限元方法解决了用于自由流体和多孔介质的动量和热传递的控制方程。通过使用假定为灰色的表面的光敏性来计算辐射传热。已经进行了对文献中的实验和数值结果的比较。分析了瑞利数对自由流体和多孔介质的自然对流和热传递的影响。发现瑞利数可以显着改变自由流动和多孔介质的区域中的温度场。随着RA的增加，界面处的平均温度降低，温度梯度在多孔介质区域的上部两个角上产生。

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