Parametric study on the influence of geometrical characteristics of horizontal wavy surface on nusselt number: Solar applications

2016 International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2016-11-01 DOI:10.1109/IRSEC.2016.7983934

Y. Agrouaz, T. Bouhal, A. Jamil, T. Kousksou, Y. Zeraouli, T. El Rhafiki, M. Bakkas

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Abstract

In this paper a steady-state natural convection was numerically simulated in horizontal rectangular cavity with a sinusoidal bottom wavy wall. This new type of surface rarely studied and investigated. The vertical walls are insulated while the bottom surface maintained to higher temperature than the top surface. In this numerical simulation that based on our elaborated code. the investigated parameters are Rayleigh number that is fixed to Ra=106, the wave length λ varied from 1 to 6 and the amplitude of the wave A is changing from 0.10 to 0.20 with a step of 0.05 were chosen in order to analyze the effect of these parameters on the heat transfer and the flow fields in two dimensional (2-D) enclosure filled with air. It is found that the geometrical parameters has a significant influence on the heat transfer inside the cavity, and also the importance of this study occur in the different applications where this kind of phenomena is present such as cooling, drying systems and solar captors.

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水平波浪面几何特性对努赛尔数影响的参数化研究:太阳能应用

本文对具有正弦底波壁的水平矩形空腔内的稳态自然对流进行了数值模拟。这种新型表面很少被研究和研究。垂直壁是绝缘的，而底部表面保持比顶部表面更高的温度。在这个基于我们精心编写的代码的数值模拟中。选取瑞利数Ra=106，波长λ为1 ~ 6，振幅A为0.10 ~ 0.20，阶跃为0.05的参数，分析了这些参数对空气填充的二维腔体传热和流场的影响。研究发现，几何参数对腔内传热有显著的影响，并且在冷却、干燥系统和太阳能捕集器等存在这种现象的不同应用中也出现了本研究的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 International Renewable and Sustainable Energy Conference (IRSEC)

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