Heat Transfer Enhancement and Flow Characteristics Past Trapezoidal Bluff Body Embedded in Unconfined Cavity Filled with Nanofluid

IF 1 4区 物理与天体物理 Q4 PHYSICS, APPLIED High Temperature Pub Date : 2024-03-03 DOI:10.1134/s0018151x23020062
B. Ghozlani, S. Hadj-Salah, S. Bezi, B. Souayeh
{"title":"Heat Transfer Enhancement and Flow Characteristics Past Trapezoidal Bluff Body Embedded in Unconfined Cavity Filled with Nanofluid","authors":"B. Ghozlani, S. Hadj-Salah, S. Bezi, B. Souayeh","doi":"10.1134/s0018151x23020062","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A numerical study has been carried out to investigate the forced convective flow around a trapezoidal cylinder exposed to a uniform stream of nanofluid. Water-based nanofluid containing various types of nanoparticles (Al<sub>2</sub>O<sub>3</sub>, Cu, and CuO) with the solid volume fraction φ varying from 0 to 8% were used to examine the fluid flow and potential heat transfer enhancement from the heated cylinder. Computations based on the finite volume method with SIMPLE algorithm have been carried out at the steady laminar flow regime with a Peclet number range of 25 ≤ Pe ≤ 150. Nanofluids flow and heat transfer characteristics are found to be highly dependent on solid volume fraction, Peclet number, and nanoparticles shapes. Enhanced wake lengths and surface vorticity, reduced drag and higher heat transfer rates are seen in nanofluids. Furthermore, the results reveal that one type of nanoparticle is a key factor for improving some engineering parameters. In particular, the height values of the average Nusselt number Nu<sub>av</sub>, the maximal surface vorticity ω<sub><i>s</i></sub>, <sub>max</sub>, and the dimensionless wake length <i>L</i><sub><i>r</i></sub> are obtained while using Cu nanoparticles. However, the values of the drag coefficient <span>\\({{C}_{D}}\\)</span> are higher for Al<sub>2</sub>O<sub>3</sub> nanoparticles. Eventually, reliable correlations for <span>\\({{\\omega }_{{s\\max }}}\\)</span>, <span>\\({{C}_{D}}\\)</span><sub>,</sub> and Nu<sub>av</sub> in terms of φ and Pe have been developed throughout this study.</p>","PeriodicalId":13163,"journal":{"name":"High Temperature","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"High Temperature","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s0018151x23020062","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0

Abstract

A numerical study has been carried out to investigate the forced convective flow around a trapezoidal cylinder exposed to a uniform stream of nanofluid. Water-based nanofluid containing various types of nanoparticles (Al2O3, Cu, and CuO) with the solid volume fraction φ varying from 0 to 8% were used to examine the fluid flow and potential heat transfer enhancement from the heated cylinder. Computations based on the finite volume method with SIMPLE algorithm have been carried out at the steady laminar flow regime with a Peclet number range of 25 ≤ Pe ≤ 150. Nanofluids flow and heat transfer characteristics are found to be highly dependent on solid volume fraction, Peclet number, and nanoparticles shapes. Enhanced wake lengths and surface vorticity, reduced drag and higher heat transfer rates are seen in nanofluids. Furthermore, the results reveal that one type of nanoparticle is a key factor for improving some engineering parameters. In particular, the height values of the average Nusselt number Nuav, the maximal surface vorticity ωs, max, and the dimensionless wake length Lr are obtained while using Cu nanoparticles. However, the values of the drag coefficient \({{C}_{D}}\) are higher for Al2O3 nanoparticles. Eventually, reliable correlations for \({{\omega }_{{s\max }}}\), \({{C}_{D}}\), and Nuav in terms of φ and Pe have been developed throughout this study.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
嵌入填充纳米流体的非封闭空腔中的梯形崖体的传热增强和流动特性
摘要 本文进行了一项数值研究,以探讨暴露在均匀纳米流体流中的梯形圆柱体周围的强制对流。水基纳米流体含有各种类型的纳米颗粒(Al2O3、Cu 和 CuO),固体体积分数 φ 从 0% 到 8% 不等,用于研究流体流动和受热圆柱体潜在的热传递增强。计算基于有限体积法和 SIMPLE 算法,在稳定层流状态下进行,佩克莱特数范围为 25 ≤ Pe ≤ 150。研究发现,纳米流体的流动和传热特性与固体体积分数、佩克莱特数和纳米颗粒形状密切相关。纳米流体的唤醒长度和表面涡度增加,阻力减小,传热率提高。此外,研究结果表明,一种类型的纳米粒子是改善某些工程参数的关键因素。特别是在使用铜纳米粒子时,平均努塞尔特数 Nuav、最大表面涡度 ωs, max 和无量纲唤醒长度 Lr 的高度值都得到了提高。然而,Al2O3 纳米粒子的阻力系数 \({{C}_{D}}\)值较高。最终,本研究建立了φ和Pe与\({{\omega }_{{s\max }}\), \({{C}_{D}}\) 和Nuav的可靠相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
High Temperature
High Temperature 物理-物理:应用
CiteScore
1.50
自引率
40.00%
发文量
0
审稿时长
4-8 weeks
期刊介绍: High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
期刊最新文献
Numerical Method For Solving the Inverse Problem of Nonisothermal Filtration in Double-Porosity Media Direct Measurement of Zirconium Melting Line up to 4 kbar by Isobaric Pulse Heating Method New Correlation Model of Thermal Conductivity of Liquid Hydrofluorochloro Derivatives of Olefins, Hydrofluorocarbons, and Hydrochlorofluorocarbons Generation of the Second Optical Harmonic under the Action of Narrowband Terahertz Pulses in the Antiferromagnet NiO Determination of the Density of the Earth’s Core Based on the Equations of State of Iron and Titanium at High Pressures and Temperatures
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1