{"title":"Investigating the Impact of Sinusoidal Walls on Fluid Flow and Heat Transfer Performance of C-Shaped Cavity","authors":"Rasul Mohebbi, Yuan Ma, Peyman Soleymani","doi":"10.1007/s40997-024-00781-y","DOIUrl":null,"url":null,"abstract":"<p>The current investigation centers on exploring the impact of sinusoidal wall surfaces on C-shaped cavities. The analysis aims to scrutinize the influence of both the Ra number and the sinusoidal wall shape function on fluid flow and heat transfer within the system. Four different sinusoidal wall shapes (<i>y</i> = sin(<i>x</i>), <i>y</i> = sin(6<i>x</i>), <i>y</i> = 4sin(<i>x</i>), <i>y</i> = 4sin(6<i>x</i>)) along with a smooth wall are being considered. The influence of Ra on the heat transfer mechanism within the cavity is prominently evident in the observations. For Ra ≤ 10<sup>4</sup>, the flow intensity is weak, and heat conduction predominantly governs the heat transfer mechanism. As Rayleigh (Ra) values surpass 10<sup>5</sup>, convective heat transfer emerges as the prevailing mechanism. Notably, heat transfer characteristics exhibit an uptick with higher Ra values. The variability in heat transfer characteristics attributed to changes in the wall shape function can be delineated based on the magnitude of change. The initial category encompasses walls with smooth surfaces, such as <i>y</i> = sin(<i>x</i>) and <i>y</i> = sin(6<i>x</i>). Conversely, the subsequent category comprises walls represented by <i>y</i> = 4sin(<i>x</i>) and <i>y</i> = 4sin(6<i>x</i>). Among these scenarios, the one featuring a smooth wall shape demonstrates the lowest heat transfer characteristics. Conversely, the case with <i>y</i> = 4sin(6<i>x</i>) walls exhibits the maximum heat transfer characteristics.</p>","PeriodicalId":49063,"journal":{"name":"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering","volume":"23 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Science and Technology-Transactions of Mechanical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s40997-024-00781-y","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The current investigation centers on exploring the impact of sinusoidal wall surfaces on C-shaped cavities. The analysis aims to scrutinize the influence of both the Ra number and the sinusoidal wall shape function on fluid flow and heat transfer within the system. Four different sinusoidal wall shapes (y = sin(x), y = sin(6x), y = 4sin(x), y = 4sin(6x)) along with a smooth wall are being considered. The influence of Ra on the heat transfer mechanism within the cavity is prominently evident in the observations. For Ra ≤ 104, the flow intensity is weak, and heat conduction predominantly governs the heat transfer mechanism. As Rayleigh (Ra) values surpass 105, convective heat transfer emerges as the prevailing mechanism. Notably, heat transfer characteristics exhibit an uptick with higher Ra values. The variability in heat transfer characteristics attributed to changes in the wall shape function can be delineated based on the magnitude of change. The initial category encompasses walls with smooth surfaces, such as y = sin(x) and y = sin(6x). Conversely, the subsequent category comprises walls represented by y = 4sin(x) and y = 4sin(6x). Among these scenarios, the one featuring a smooth wall shape demonstrates the lowest heat transfer characteristics. Conversely, the case with y = 4sin(6x) walls exhibits the maximum heat transfer characteristics.
目前的研究重点是探索正弦壁面对 C 型空腔的影响。分析旨在仔细研究 Ra 值和正弦壁面形状函数对系统内流体流动和热传递的影响。研究考虑了四种不同的正弦壁面形状(y = sin(x)、y = sin(6x)、y = 4sin(x)、y = 4sin(6x))以及光滑壁面。从观测结果来看,Ra 对空腔内传热机制的影响非常明显。当 Ra ≤ 104 时,流动强度较弱,传热机制主要受热传导影响。当瑞利(Ra)值超过 105 时,对流传热成为主要机制。值得注意的是,随着 Ra 值的升高,传热特性也呈现出上升趋势。墙壁形状函数变化引起的传热特性的变化可以根据变化的幅度来划分。第一类包括表面光滑的壁,如 y = sin(x) 和 y = sin(6x)。相反,后一类包括 y = 4sin(x) 和 y = 4sin(6x) 所代表的墙壁。在这些情况中,壁面形状光滑的情况传热特性最低。相反,墙壁为 y = 4sin(6x)的情况则具有最高的传热特性。
期刊介绍:
Transactions of Mechanical Engineering is to foster the growth of scientific research in all branches of mechanical engineering and its related grounds and to provide a medium by means of which the fruits of these researches may be brought to the attentionof the world’s scientific communities. The journal has the focus on the frontier topics in the theoretical, mathematical, numerical, experimental and scientific developments in mechanical engineering as well
as applications of established techniques to new domains in various mechanical engineering disciplines such as: Solid Mechanics, Kinematics, Dynamics Vibration and Control, Fluids Mechanics, Thermodynamics and Heat Transfer, Energy and Environment, Computational Mechanics, Bio Micro and Nano Mechanics and Design and Materials Engineering & Manufacturing.
The editors will welcome papers from all professors and researchers from universities, research centers,
organizations, companies and industries from all over the world in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.