Numerical analysis of natural convection in a porous circular bend

IF 2.2 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY Journal of Engineering Research Pub Date : 2025-06-01 Epub Date: 2024-04-04 DOI:10.1016/j.jer.2024.04.001

Humayoun Shahid , Hasan B. Albargi , Muhammad Ahsan , Fayyaz Ahmad , Mohammed Jalalah , M.M. Abdullah

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Abstract

The study of natural convection in porous circular bends is pivotal due to its applications in various cooling system designs. This paper focuses on a circular bend with a heated inner wall and a colder outer wall, employing the finite difference method to solve the governing equations. The research encompasses Rayleigh numbers ranging from 20 to 750 and an aspect ratio (defined as

R = \frac{R_{2} - R_{1}}{R_{1}}

) from 1.0 to 2.0. The findings highlight that variations in Rayleigh numbers and the circle’s radius significantly enhance heat transfer rates via convection, underscoring their critical roles in influencing flow and heat transfer within this configuration. It is also observed that theNu_Avg on the heated wall increase with the increase in R. It is observed that for R = 0.75, Nu_Avg is 8.8 and for R = 1.5, Nu_Avg is increase to 9.7.

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多孔圆形弯道中自然对流的数值分析

多孔圆形弯道内自然对流的研究在各种冷却系统设计中有着重要的应用。本文研究了一种内壁受热、外壁受冷的圆形弯道，采用有限差分法求解了其控制方程。研究包括瑞利数范围从20到750，宽高比（定义为R=R2−R1R1）范围从1.0到2.0。研究结果强调，瑞利数和圆半径的变化显著提高了对流传热率，强调了它们在影响该结构内的流动和传热方面的关键作用。当R = 0.75时，NuAvg为8.8；当R = 1.5时，NuAvg增大到9.7。

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来源期刊

Journal of Engineering Research ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

181

审稿时长

20 weeks

期刊介绍： Journal of Engineering Research (JER) is a international, peer reviewed journal which publishes full length original research papers, reviews, case studies related to all areas of Engineering such as: Civil, Mechanical, Industrial, Electrical, Computer, Chemical, Petroleum, Aerospace, Architectural, Biomedical, Coastal, Environmental, Marine & Ocean, Metallurgical & Materials, software, Surveying, Systems and Manufacturing Engineering. In particular, JER focuses on innovative approaches and methods that contribute to solving the environmental and manufacturing problems, which exist primarily in the Arabian Gulf region and the Middle East countries. Kuwait University used to publish the Journal "Kuwait Journal of Science and Engineering" (ISSN: 1024-8684), which included Science and Engineering articles since 1974. In 2011 the decision was taken to split KJSE into two independent Journals - "Journal of Engineering Research "(JER) and "Kuwait Journal of Science" (KJS).