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Effect of Aspect Ratio on Natural Convection in a PorousWavy Cavity

机译:长宽比对多孔腔内自然对流的影响

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The present study analyzes natural convective flow and heat transfer in a wavy cavity saturated with porous medium. The sidewalls of the cavity are maintained at constant temperatures where higher temperature is applied on the vertical left wall while the wavy right wall is cooled at a lower temperature. The remaining top and bottom walls are taken to be adiabatic. The Darcy model is adopted for the fluid flow through the porous medium. The governing equations and boundary conditions are solved using the finite difference method over a range of cavity aspect ratios, wavy wall amplitudes, number of undulations and Darcy-Rayleigh numbers. The waviness of the cavity enhances the heat transfer inside the cavity, and the heat transfer rate is more enhanced when the aspect ratio of the cavity is close to 1. The study is applicable to the design of solar heating systems and geothermal reservoirs.
机译:本研究分析了充满多孔介质的波浪形腔体中的自然对流流动和热传递。空腔的侧壁保持恒定的温度,在垂直的左壁上施加较高的温度,而在较低的温度下将波浪形的右壁冷却。其余的顶壁和底壁被认为是绝热的。对于通过多孔介质的流体,采用Darcy模型。控制方程和边界条件使用有限差分法在一定的腔长宽比,波浪壁振幅,起伏数和达西-瑞利数范围内求解。腔的波纹度增强了腔内部的热传递,并且当腔的长径比接近1时,传热速率进一步提高。该研究适用于太阳能供热系统和地热库的设计。

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