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首页> 外文期刊>Applied Mechanics and Engineering >A STUDY OF NATURAL CONVECTION IN ANISOTROPIC POROUS RECTANGULAR CHANNELS USING A THERMAL NON-EQUILIBRIUM MODEL
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A STUDY OF NATURAL CONVECTION IN ANISOTROPIC POROUS RECTANGULAR CHANNELS USING A THERMAL NON-EQUILIBRIUM MODEL

机译：热非平衡模型研究各向异性多孔矩形通道中的自然对流

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摘要

A study of natural convection in a two dimensional rectangular channel filled with anisotropic porous media is considered, when the fluid and solid phases are not in local thermal equilibrium. Walls of the channel are non-uniformly heated to establish a linear temperature gradient and they are assumed to be impermeable and perfectly conducting. Darcy model with anisotropic permeability is used to describe the flow and a two field models are used for energy equation each representing fluid and solid phases separately. The critical Rayleigh number for the onset of convection using linear stability analysis is obtained numerically as a function of mechanical anisotropy parameters, interphase heat transfer coefficient and aspect ratio, and the same is plotted graphically, and discussed in detail.
机译：当流体和固相不处于局部热平衡状态时，考虑对填充各向异性多孔介质的二维矩形通道中的自然对流进行研究。通道壁被非均匀地加热以建立线性温度梯度，并且假定它们是不可渗透的并且传导完美。用具有各向异性渗透率的达西模型描述流动，并使用两个场模型作为能量方程，分别代表流体和固相。利用线性稳定性分析，通过数值获得了对流开始时的临界瑞利数，该临界瑞利数是机械各向异性参数，相间传热系数和纵横比的函数，并以图形方式绘制并详细讨论。

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