Impact of height and secondary flow patterns of circle, square and triangle shaped pin fins on microchannel heat sinks performance

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-10-07 DOI:10.1016/j.tsep.2025.104166

Moza Alteneiji, Ahmed Raafat, Saeed K. Alnuaimi

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引用次数: 0

Abstract

The geometric design of pin fins significantly impacts the thermal and hydraulic performance of microchannel heat sinks (MCHSs). This study, which uses Ansys Fluent, investigates the effect of pin fin height (full height and half height) and shape (circular, square, triangular) on the pressure drop, temperature distribution, velocity fields, Nusselt number, and thermal efficiency for different Reynolds numbers. Six different configurations were studied. It has been concluded that circular pin fins have the least pressure drop, whereas square fins have maximum resistance. While full-height fins gather more thermal energy, half-height fins outperformed these both thermally and hydraulically, owing to increased secondary cooling flows and blockage effects reduction. The half-height circular pin fin was identified as the optimum design being able to achieve a high heat transfer coefficient with a low hydrodynamic resistance. The results of this analysis could provide beneficial guidelines for the optimization of the pin fin geometry in high-performance thermal management applications.

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圆、方、三角形钉片高度及二次流型对微通道散热器性能的影响

钉片的几何设计对微通道散热器的热工性能和水力性能有重要影响。本研究利用Ansys Fluent软件，研究了不同雷诺数下，针翅高度（全高和半高）和形状（圆形、方形、三角形）对压降、温度分布、速度场、努塞尔数和热效率的影响。研究了六种不同的结构。结果表明，圆形钉片的压降最小，而方形钉片的阻力最大。虽然全高翅片可以收集更多的热能，但由于二次冷却流量的增加和堵塞效应的减少，半高翅片在热性能和水力性能上都优于全高翅片。确定了半高圆钉翅的最佳设计方案，可以实现高的传热系数和低的水动力阻力。该分析结果可为高性能热管理应用中引脚翅几何结构的优化提供有益的指导。

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

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.