{"title":"对带有不同方形叶片的多孔空腔进行数值研究,重点关注努塞尔特数","authors":"","doi":"10.1016/j.ijft.2024.100860","DOIUrl":null,"url":null,"abstract":"<div><p>This study extensively analyzes various regular and irregular vanes in pipe porous cavities on natural convection, thermal entropy generation, stream function, and temperature distribution in fluid and solid phases. The finite element method (FEM) is employed to study stream function, temperature distribution in the fluid phase and solid phase, and various γ for Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> in SR, TR, SIR, and TIR. In the present study, a significant contribution of this research is the investigation into the effects of regular versus irregular vanes in the context of enclosures formed by pipe porous cavities that the SIR specimen has the most influence on stream function and thermal effect in the fluid phase and solid phase that aims to enhance system performance and optimize energy efficiency. In addition, the significant influence of geometrical parameters constitutes many heated obstacles in the middle of SIR, various heated vanes in the left of SIR, and employed Ra and ε in the analysis of <em>Nu</em><sub><em>f</em>, <em>ave</em></sub> and <em>Nu</em><sub><em>s</em>, <em>ave</em></sub> in SIR are carried out to investigate the percentage discrepancies obtained, notably 89.35 % and 89.72 %, respectively. In validation, the calculation in results was adapted accurately to the finite element method's stream function, the temperature distribution in the fluid phase and solid phase, and various γ for Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> which means that the percentage differences in obtaining results reached under 1 %. Numerical results revealed that the Hartman number has a significant influence in S<sub>htf, ave</sub>, S<sub>hts, ave</sub>, Ty<sub>ave</sub>, Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> in TR, SR, TIR, and SIR.</p></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266620272400301X/pdfft?md5=e000eceb605c7b81a240dd411f333eb6&pid=1-s2.0-S266620272400301X-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Numerical study of the porous cavity with different square size vanes with a high focus on Nusselt number\",\"authors\":\"\",\"doi\":\"10.1016/j.ijft.2024.100860\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study extensively analyzes various regular and irregular vanes in pipe porous cavities on natural convection, thermal entropy generation, stream function, and temperature distribution in fluid and solid phases. The finite element method (FEM) is employed to study stream function, temperature distribution in the fluid phase and solid phase, and various γ for Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> in SR, TR, SIR, and TIR. In the present study, a significant contribution of this research is the investigation into the effects of regular versus irregular vanes in the context of enclosures formed by pipe porous cavities that the SIR specimen has the most influence on stream function and thermal effect in the fluid phase and solid phase that aims to enhance system performance and optimize energy efficiency. In addition, the significant influence of geometrical parameters constitutes many heated obstacles in the middle of SIR, various heated vanes in the left of SIR, and employed Ra and ε in the analysis of <em>Nu</em><sub><em>f</em>, <em>ave</em></sub> and <em>Nu</em><sub><em>s</em>, <em>ave</em></sub> in SIR are carried out to investigate the percentage discrepancies obtained, notably 89.35 % and 89.72 %, respectively. In validation, the calculation in results was adapted accurately to the finite element method's stream function, the temperature distribution in the fluid phase and solid phase, and various γ for Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> which means that the percentage differences in obtaining results reached under 1 %. Numerical results revealed that the Hartman number has a significant influence in S<sub>htf, ave</sub>, S<sub>hts, ave</sub>, Ty<sub>ave</sub>, Nu<sub>f, ave</sub> and Nu<sub>s, ave</sub> in TR, SR, TIR, and SIR.</p></div>\",\"PeriodicalId\":36341,\"journal\":{\"name\":\"International Journal of Thermofluids\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S266620272400301X/pdfft?md5=e000eceb605c7b81a240dd411f333eb6&pid=1-s2.0-S266620272400301X-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Thermofluids\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S266620272400301X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Chemical Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermofluids","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S266620272400301X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 0
摘要
本研究广泛分析了管道多孔空腔中各种规则和不规则叶片对自然对流、热熵产生、流函数以及流体和固体相温度分布的影响。采用有限元法(FEM)研究了 SR、TR、SIR 和 TIR 中的流函数、流体相和固体相的温度分布以及 Nuf, ave 和 Nus, ave 的各种 γ。在本研究中,本研究的一个重要贡献是调查了在由管道多孔空腔形成的围护结构中,规则叶片与不规则叶片的影响,发现 SIR 试样对流体相和固体相中的流功能和热效应影响最大,其目的是提高系统性能和优化能源效率。此外,在分析 SIR 中的 Nuf, ave 和 Nus, ave 时,还采用了 Ra 和 ε,研究了 SIR 中许多受热障碍物和左侧各种受热叶片构成的几何参数的重要影响,得出的差异百分比分别为 89.35 % 和 89.72 %。在验证过程中,计算结果准确地适应了有限元法的流函数、流体相和固体相的温度分布以及 Nuf, ave 和 Nus, ave 的不同 γ,这意味着计算结果的百分比差异低于 1%。数值结果表明,哈特曼数对 TR、SR、TIR 和 SIR 中的 Shtf、ave、Shts、ave、Tyave、Nuf、ave 和 Nus、ave 有显著影响。
Numerical study of the porous cavity with different square size vanes with a high focus on Nusselt number
This study extensively analyzes various regular and irregular vanes in pipe porous cavities on natural convection, thermal entropy generation, stream function, and temperature distribution in fluid and solid phases. The finite element method (FEM) is employed to study stream function, temperature distribution in the fluid phase and solid phase, and various γ for Nuf, ave and Nus, ave in SR, TR, SIR, and TIR. In the present study, a significant contribution of this research is the investigation into the effects of regular versus irregular vanes in the context of enclosures formed by pipe porous cavities that the SIR specimen has the most influence on stream function and thermal effect in the fluid phase and solid phase that aims to enhance system performance and optimize energy efficiency. In addition, the significant influence of geometrical parameters constitutes many heated obstacles in the middle of SIR, various heated vanes in the left of SIR, and employed Ra and ε in the analysis of Nuf, ave and Nus, ave in SIR are carried out to investigate the percentage discrepancies obtained, notably 89.35 % and 89.72 %, respectively. In validation, the calculation in results was adapted accurately to the finite element method's stream function, the temperature distribution in the fluid phase and solid phase, and various γ for Nuf, ave and Nus, ave which means that the percentage differences in obtaining results reached under 1 %. Numerical results revealed that the Hartman number has a significant influence in Shtf, ave, Shts, ave, Tyave, Nuf, ave and Nus, ave in TR, SR, TIR, and SIR.