Heat Transfer By Natural Convection from a Heated Square Inner Cylinder to Its Elliptical Outer Enclosure Utilizing Nanofluids

Q3 Chemical Engineering

International Journal of Applied Mechanics and Engineering Pub Date : 2022-06-01 DOI:10.2478/ijame-2022-0017

Abdelaziz Bouras, Djedid Taloub, Z. Driss, Siham Debka

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Abstract

Abstract In this paper a numerical study of natural convection of stationary laminar heat transfers in a horizontal ring between a heated square inner cylinder and a cold elliptical outer cylinder is presented. A Cu-water nanofluid flows through this annular space. Different values of the Rayleigh number and volume fraction of nanoparticles are studied. The system of equations governing the problem was solved numerically by the fluent calculation code based on the finite volume method and on the Boussinesq approximation. The interior and exterior surfaces are kept at constant temperature. The study is carried out for Rayleigh numbers ranging from 103 to 105. We have studied the effects of different Rayleigh numbers and volume fraction of nanoparticles on natural convection. The results are presented as isotherms, isocurrents, and local and mean Nusselt numbers. The aim of this study is to study the influence of the thermal Rayleigh number and volume fraction of nanoparticles on the heat transfer rate.

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利用纳米流体从受热的方形内圆柱体到其椭圆形外罩的自然对流传热

摘要本文对受加热的方形内筒与受冷的椭圆形外筒在水平环内的定常层流自然对流换热进行了数值研究。铜水纳米流体流过这个环形空间。研究了不同的瑞利数和纳米颗粒的体积分数。利用基于有限体积法和Boussinesq近似的fluent计算程序对控制该问题的方程组进行了数值求解。内部和外部表面保持恒定温度。这项研究是对103到105之间的瑞利数进行的。研究了不同瑞利数和纳米颗粒体积分数对自然对流的影响。结果以等温线、等流、局部努塞尔数和平均努塞尔数表示。本研究的目的是研究热瑞利数和纳米颗粒体积分数对传热速率的影响。

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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来源期刊

International Journal of Applied Mechanics and Engineering Engineering-Civil and Structural Engineering

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

35 weeks

期刊介绍： INTERNATIONAL JOURNAL OF APPLIED MECHANICS AND ENGINEERING is an archival journal which aims to publish high quality original papers. These should encompass the best fundamental and applied science with an emphasis on their application to the highest engineering practice. The scope includes all aspects of science and engineering which have relevance to: biomechanics, elasticity, plasticity, vibrations, mechanics of structures, mechatronics, plates & shells, magnetohydrodynamics, rheology, thermodynamics, tribology, fluid dynamics.