Synergistic effects of passive and active heat transfer enhancement strategies in a confined domain

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-09-13 DOI:10.1016/j.ijheatfluidflow.2025.110060

Utkarsh Alok, Mir Rahaman, Jaya Krishna Devanuri

{"title":"Synergistic effects of passive and active heat transfer enhancement strategies in a confined domain","authors":"Utkarsh Alok, Mir Rahaman, Jaya Krishna Devanuri","doi":"10.1016/j.ijheatfluidflow.2025.110060","DOIUrl":null,"url":null,"abstract":"<div><div>With the increasing use of various cooling methods in electronics and high-temperature industrial processes, the impact of active (Piezoelectric fan – PE fan) and passive (fin) cooling methods has become of utmost importance in research. Studies coupling the usage of PE fans and fins with buoyancy-induced flows will be of great interest in several thermal equipment applications. This study utilizes numerical simulations to investigate natural convection in a cavity for three different scenarios – with fin(s), with PE fan, and with fin(s) and PE fan, concentrating on the effects of Rayleigh numbers (Ra) 10<sup>3</sup> and 10<sup>5</sup>. The results show how the usage of fins, PE fan, or both together can influence the thermal transport with the variation of the Rayleigh number. It is found that the coupling effect of both methods gives the best heat transfer for any Rayleigh number among the cases considered. For Ra = 10<sup>3</sup>, three fins on the hot wall with a PE fan on the cold wall, and for Ra = 10<sup>5</sup>, one fin on the hot wall with a PE fan on the cold wall, transfer the heat most efficiently with an increment of 114.33 % and 18.07 % compared to a reference case of a differentially heated cavity. An increase in the number of fins acts as an impediment to the fluid flow in case of the higher Rayleigh number (10<sup>5</sup>), but it enhances the heat transfer rate for the lower Rayleigh number (10<sup>3</sup>).</div></div>","PeriodicalId":335,"journal":{"name":"International Journal of Heat and Fluid Flow","volume":"117 ","pages":"Article 110060"},"PeriodicalIF":2.6000,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Fluid Flow","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0142727X25003182","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

With the increasing use of various cooling methods in electronics and high-temperature industrial processes, the impact of active (Piezoelectric fan – PE fan) and passive (fin) cooling methods has become of utmost importance in research. Studies coupling the usage of PE fans and fins with buoyancy-induced flows will be of great interest in several thermal equipment applications. This study utilizes numerical simulations to investigate natural convection in a cavity for three different scenarios – with fin(s), with PE fan, and with fin(s) and PE fan, concentrating on the effects of Rayleigh numbers (Ra) 10³ and 10⁵. The results show how the usage of fins, PE fan, or both together can influence the thermal transport with the variation of the Rayleigh number. It is found that the coupling effect of both methods gives the best heat transfer for any Rayleigh number among the cases considered. For Ra = 10³, three fins on the hot wall with a PE fan on the cold wall, and for Ra = 10⁵, one fin on the hot wall with a PE fan on the cold wall, transfer the heat most efficiently with an increment of 114.33 % and 18.07 % compared to a reference case of a differentially heated cavity. An increase in the number of fins acts as an impediment to the fluid flow in case of the higher Rayleigh number (10⁵), but it enhances the heat transfer rate for the lower Rayleigh number (10³).

查看原文本刊更多论文

有限区域内被动和主动传热强化策略的协同效应

随着各种冷却方法在电子和高温工业过程中的使用越来越多，主动（压电风扇- PE风扇）和被动（翅片）冷却方法的影响已成为研究的重中之重。将PE风扇和翅片的使用与浮力引起的流动耦合起来的研究将在一些热设备应用中引起极大的兴趣。本研究利用数值模拟研究了三种不同情况下的腔内自然对流——有翅片、有PE风扇、有翅片和PE风扇，重点研究了瑞利数（Ra） 103和105的影响。结果表明，翅片、PE风扇或两者同时使用对热输运随瑞利数变化的影响。结果表明，两种方法的耦合效应对任意瑞利数的传热效果最好。当Ra = 103时，热壁上的三个翅片在冷壁上安装PE风扇，而当Ra = 105时，热壁上的一个翅片在冷壁上安装PE风扇，与差热腔的参考情况相比，传热效率最高，分别增加了114.33%和18.07%。在瑞利数较高（105）的情况下，翅片数量的增加会阻碍流体流动，但在瑞利数较低（103）的情况下，翅片数量的增加会提高传热率。

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分钟内获得全文求助全文

来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.