Enhanced thermal performance and entropy management in a Y-shaped cavity with an inner rectangular Vertical Wall: A computational study with sensitivity analysis using response surface methodology

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-10-10 DOI:10.1016/j.icheatmasstransfer.2025.109812

Bijan Krishna Saha , Ashik Ahmed Shuvo , Md. Shah Najmus Shakib , Litan Kumar Saha , Goutam Saha

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引用次数: 0

Abstract

Natural convection (NC) and heat transfer (HT) in complex geometries are critical for optimizing thermal systems, including electronic cooling and energy-efficient designs. Our research aims to analyze the effect of the Rayleigh number (Ra) under different rectangular vertical wall (RVW) thermal boundary conditions on HT efficiency and entropy generation (E_gen). The Finite Element Method is used to solve the governing equations. Key parameters include Ra = 10³ to 10⁶, Prandtl number (Pr = 7.0), and various RVW configurations. Results reveal that an increase in Ra enhances both the average Nusselt number (Nu_avg) and E_gen while reducing the Bejan number (Be), indicating intensified flow and higher viscous dissipation. At Ra = 10⁶, the heated RVW shows only a 4.61 % higher Nu_avg than the cold RVW, but results in 88.36 % higher E_gen and a 42.25 % lower Be, suggesting a dominance of viscous effects. Sensitivity analysis shows that Ra is the most influential factor on Nu_avg, while RVW height (h) has a moderate and width (w) a weak positive influence. This study provides critical insights into the design of thermally efficient systems, highlighting the significant roles of RVW thermal conditions and Ra in balancing HT performance and E_gen within a Y-shaped enclosure.

To ensure the accuracy of our simulation, we conducted qualitative validation using other published studies and quantitative validation, achieving an error margin below 1 %.

查看原文本刊更多论文

具有内矩形垂直壁的y形腔的增强热性能和熵管理：利用响应面方法进行灵敏度分析的计算研究

复杂几何结构中的自然对流（NC）和热传递（HT）对于优化热系统至关重要，包括电子冷却和节能设计。本研究旨在分析不同矩形垂壁（RVW）热边界条件下瑞利数（Ra）对高温效率和熵产（Egen）的影响。采用有限元法求解控制方程。关键参数包括Ra = 103 ~ 106， Prandtl数（Pr = 7.0）和各种RVW配置。结果表明，Ra的增加增加了平均努塞尔数（Nuavg）和Egen，降低了贝让数（Be），表明流动加剧和粘性耗散增加。在Ra = 106时，加热RVW的Nuavg仅比冷RVW高4.61%，但Egen高88.36%，Be低42.25%，表明粘性效应占主导地位。敏感性分析表明，Ra对Nuavg的影响最大，而RVW高度(h)对Nuavg的影响中等，宽度(w)对Nuavg的影响较弱。这项研究为热效率系统的设计提供了重要的见解，强调了RVW热条件和Ra在y形外壳内平衡高温性能和Egen方面的重要作用。为了确保模拟的准确性，我们使用其他已发表的研究和定量验证进行了定性验证，使误差范围低于1%。

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

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.