Nirmal K. Manna, Abhinav Saha, Nirmalendu Biswas, Koushik Ghosh
{"title":"基于约束条件的磁性纳米流体热系统热传输和不可逆分析","authors":"Nirmal K. Manna, Abhinav Saha, Nirmalendu Biswas, Koushik Ghosh","doi":"10.1108/hff-06-2023-0329","DOIUrl":null,"url":null,"abstract":"<h3>Purpose</h3>\n<p>This paper aims to investigate the thermal performance of equivalent square and circular thermal systems and compare the heat transport and irreversibility of magnetohydrodynamic (MHD) nanofluid flow within these systems.</p><!--/ Abstract__block -->\n<h3>Design/methodology/approach</h3>\n<p>The research uses a constraint-based approach to analyze the impact of geometric shapes on heat transfer and irreversibility. Two equivalent systems, a square cavity and a circular cavity, are examined, considering identical heating/cooling lengths and fluid flow volume. The analysis includes parameters such as magnetic field strength, nanoparticle concentration and accompanying irreversibility.</p><!--/ Abstract__block -->\n<h3>Findings</h3>\n<p>This study reveals that circular geometry outperforms square geometry in terms of heat flow, fluid flow and heat transfer. The equivalent circular thermal system is more efficient, with heat transfer enhancements of approximately 17.7%. The corresponding irreversibility production rate is also higher, which is up to 17.6%. The total irreversibility production increases with Ra and decreases with a rise in Ha. However, the effect of magnetic field orientation (<em>γ</em>) on total EG is minor.</p><!--/ Abstract__block -->\n<h3>Research limitations/implications</h3>\n<p>Further research can explore additional geometric shapes, orientations and boundary conditions to expand the understanding of thermal performance in different configurations. Experimental validation can also complement the numerical analysis presented in this study.</p><!--/ Abstract__block -->\n<h3>Originality/value</h3>\n<p>This research introduces a constraint-based approach for evaluating heat transport and irreversibility in MHD nanofluid flow within square and circular thermal systems. The comparison of equivalent geometries and the consideration of constraint-based analysis contribute to the originality and value of this work. The findings provide insights for designing optimal thermal systems and advancing MHD nanofluid flow control mechanisms, offering potential for improved efficiency in various applications.</p><!--/ Abstract__block -->\n<h3>Graphical Abstract</h3>\n<p><img alt=\"\" data-src=\"/insight/proxy/img?link=/resource/id/urn:emeraldgroup.com:asset:id:article:10_1108_HFF-06-2023-0329/\" src=\"/insight/static/img/emerald-loading-wide-xl.gif\"/></p><!--/ Abstract__block -->","PeriodicalId":14263,"journal":{"name":"International Journal of Numerical Methods for Heat & Fluid Flow","volume":"38 1","pages":""},"PeriodicalIF":4.0000,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Constraint-based analysis of heat transport and irreversibility in magnetic nanofluidic thermal systems\",\"authors\":\"Nirmal K. Manna, Abhinav Saha, Nirmalendu Biswas, Koushik Ghosh\",\"doi\":\"10.1108/hff-06-2023-0329\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3>Purpose</h3>\\n<p>This paper aims to investigate the thermal performance of equivalent square and circular thermal systems and compare the heat transport and irreversibility of magnetohydrodynamic (MHD) nanofluid flow within these systems.</p><!--/ Abstract__block -->\\n<h3>Design/methodology/approach</h3>\\n<p>The research uses a constraint-based approach to analyze the impact of geometric shapes on heat transfer and irreversibility. Two equivalent systems, a square cavity and a circular cavity, are examined, considering identical heating/cooling lengths and fluid flow volume. The analysis includes parameters such as magnetic field strength, nanoparticle concentration and accompanying irreversibility.</p><!--/ Abstract__block -->\\n<h3>Findings</h3>\\n<p>This study reveals that circular geometry outperforms square geometry in terms of heat flow, fluid flow and heat transfer. The equivalent circular thermal system is more efficient, with heat transfer enhancements of approximately 17.7%. The corresponding irreversibility production rate is also higher, which is up to 17.6%. The total irreversibility production increases with Ra and decreases with a rise in Ha. However, the effect of magnetic field orientation (<em>γ</em>) on total EG is minor.</p><!--/ Abstract__block -->\\n<h3>Research limitations/implications</h3>\\n<p>Further research can explore additional geometric shapes, orientations and boundary conditions to expand the understanding of thermal performance in different configurations. Experimental validation can also complement the numerical analysis presented in this study.</p><!--/ Abstract__block -->\\n<h3>Originality/value</h3>\\n<p>This research introduces a constraint-based approach for evaluating heat transport and irreversibility in MHD nanofluid flow within square and circular thermal systems. The comparison of equivalent geometries and the consideration of constraint-based analysis contribute to the originality and value of this work. The findings provide insights for designing optimal thermal systems and advancing MHD nanofluid flow control mechanisms, offering potential for improved efficiency in various applications.</p><!--/ Abstract__block -->\\n<h3>Graphical Abstract</h3>\\n<p><img alt=\\\"\\\" data-src=\\\"/insight/proxy/img?link=/resource/id/urn:emeraldgroup.com:asset:id:article:10_1108_HFF-06-2023-0329/\\\" src=\\\"/insight/static/img/emerald-loading-wide-xl.gif\\\"/></p><!--/ Abstract__block -->\",\"PeriodicalId\":14263,\"journal\":{\"name\":\"International Journal of Numerical Methods for Heat & Fluid Flow\",\"volume\":\"38 1\",\"pages\":\"\"},\"PeriodicalIF\":4.0000,\"publicationDate\":\"2024-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Numerical Methods for Heat & Fluid Flow\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1108/hff-06-2023-0329\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Numerical Methods for Heat & Fluid Flow","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1108/hff-06-2023-0329","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
摘要
目的 本文旨在研究等效方形和圆形热系统的热性能，并比较这些系统内磁流体动力学（MHD）纳米流体流动的热传输和不可逆性。考虑到相同的加热/冷却长度和流体流动体积，研究了两个等效系统，即方形空腔和圆形空腔。分析包括磁场强度、纳米粒子浓度和伴随的不可逆性等参数。研究结果这项研究表明，在热流、流体流动和传热方面，圆形几何形状优于方形几何形状。等效圆形热系统的效率更高，传热效率提高了约 17.7%。相应的不可逆生成率也更高，高达 17.6%。总不可逆生成量随 Ra 的增加而增加，随 Ha 的增加而减少。然而，磁场方向 (γ) 对总 EG 的影响很小。研究局限/意义进一步的研究可以探索更多的几何形状、方向和边界条件，以扩展对不同配置下热性能的理解。实验验证也可以补充本研究中的数值分析。本研究介绍了一种基于约束的方法，用于评估方形和圆形热系统中 MHD 纳米流体流动的热传输和不可逆性。对等效几何形状的比较和基于约束的分析考虑有助于提高这项工作的原创性和价值。研究结果为设计最佳热系统和推进 MHD 纳米流体流动控制机制提供了见解，为提高各种应用的效率提供了潜力。
Constraint-based analysis of heat transport and irreversibility in magnetic nanofluidic thermal systems
Purpose
This paper aims to investigate the thermal performance of equivalent square and circular thermal systems and compare the heat transport and irreversibility of magnetohydrodynamic (MHD) nanofluid flow within these systems.
Design/methodology/approach
The research uses a constraint-based approach to analyze the impact of geometric shapes on heat transfer and irreversibility. Two equivalent systems, a square cavity and a circular cavity, are examined, considering identical heating/cooling lengths and fluid flow volume. The analysis includes parameters such as magnetic field strength, nanoparticle concentration and accompanying irreversibility.
Findings
This study reveals that circular geometry outperforms square geometry in terms of heat flow, fluid flow and heat transfer. The equivalent circular thermal system is more efficient, with heat transfer enhancements of approximately 17.7%. The corresponding irreversibility production rate is also higher, which is up to 17.6%. The total irreversibility production increases with Ra and decreases with a rise in Ha. However, the effect of magnetic field orientation (γ) on total EG is minor.
Research limitations/implications
Further research can explore additional geometric shapes, orientations and boundary conditions to expand the understanding of thermal performance in different configurations. Experimental validation can also complement the numerical analysis presented in this study.
Originality/value
This research introduces a constraint-based approach for evaluating heat transport and irreversibility in MHD nanofluid flow within square and circular thermal systems. The comparison of equivalent geometries and the consideration of constraint-based analysis contribute to the originality and value of this work. The findings provide insights for designing optimal thermal systems and advancing MHD nanofluid flow control mechanisms, offering potential for improved efficiency in various applications.
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
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
