Entropy analysis of convective nanofluid flow with Brownian motion in an annular space between confocal elliptic cylinders

IF 4 3区 工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS
Boussouffi Mustapha, Amina Sabeur
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引用次数: 0

Abstract

Purpose

This study aims to provide an in-depth analysis of entropy generation (EG) during natural convection within the annular space between confocal elliptic cylinders, with a specific focus on the influence of Brownian motion on nanofluid behavior.

Design/methodology/approach

A finite volume control method was used to conduct a detailed numerical analysis, examining the behavior of various nanofluids across a range of volume concentrations (2%–6%) and Rayleigh numbers. The study explores heat transfer (HT) and fluid flow mechanisms, particularly highlighting the role of nanoparticle Brownian motion in enhancing thermal conductivity.

Findings

The findings reveal that increased Rayleigh numbers significantly improve HT rates, while at lower Rayleigh values, EG is primarily governed by thermodynamic irreversibility. At higher Rayleigh numbers, this irreversibility plays a less dominant role in overall entropy production.

Originality/value

This study offers a novel perspective on the interplay between Rayleigh numbers, Brownian motion and EG, providing valuable insights for optimizing HT processes in engineering applications involving nanofluids.

纳米流体在共焦椭圆圆柱间环形空间中布朗运动的熵分析
本研究旨在深入分析共焦椭圆圆柱间环形空间内自然对流过程中的熵产(EG),并重点研究布朗运动对纳米流体行为的影响。设计/方法/方法采用有限体积控制方法进行了详细的数值分析,研究了各种纳米流体在体积浓度(2%-6%)和瑞利数范围内的行为。该研究探讨了传热(HT)和流体流动机制,特别强调了纳米颗粒布朗运动在增强导热性方面的作用。研究结果表明,瑞利值的增加显著提高了高温速率,而在瑞利值较低时,高温速率主要受热力学不可逆性控制。当瑞利数较高时,这种不可逆性在总熵产生中的主导作用较小。独创性/价值本研究为瑞利数、布朗运动和EG之间的相互作用提供了一个新的视角,为优化涉及纳米流体的工程应用中的高温处理过程提供了有价值的见解。
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
CiteScore
9.50
自引率
11.90%
发文量
100
审稿时长
6-12 weeks
期刊介绍: The main objective of this international journal is to provide applied mathematicians, engineers and scientists engaged in computer-aided design and research in computational heat transfer and fluid dynamics, whether in academic institutions of industry, with timely and accessible information on the development, refinement and application of computer-based numerical techniques for solving problems in heat and fluid flow. - See more at: http://emeraldgrouppublishing.com/products/journals/journals.htm?id=hff#sthash.Kf80GRt8.dpuf
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