磁场对含铁粒子悬浮纳米流体填充发热体方形围护结构的影响

IF 2.7 Q3 NANOSCIENCE & NANOTECHNOLOGY Journal of Nanofluids Pub Date : 2023-06-01 DOI:10.1166/jon.2023.2043
P. Umadevi, A. Begum, Ali J. Chamkha, G. Maheshwari
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引用次数: 0

摘要

在磁场条件下,对一个充满铁粒子悬浮纳米流体的封闭体进行了数值分析,以研究自然对流换热。围护结构的中心是一个导热产热的固体,围护结构受到四种不同热边界条件的影响。为了求解控制方程,提出了一种基于有限体积法的Fortran算法。对于瑞利数(104≤Ra≤106)、哈特曼数(0≤Ha≤100)、固体体积分数(0≤φ≤0.2)、分布壁面温度等多种无因次参数,本文采用的数值方法得到了一致的结果。流线、等温线和努塞尔数图被用来描述流动和传热特性。在此基础上,研究发现,随着哈特曼数的降低,瑞利数的增加,沿正弦壁面的换热效果更好。当哈特曼数较低时,瑞利数越高,流体流动越强。特别是,铁颗粒悬浮纳米流体的存在提高了传热速率。此外,这项研究还发现,磁场和纳米颗粒的结合可以使传热增加高达60%。本研究建议的方法可以帮助制造商提高效率,而不增加工业应用中用于冷却或加热的热发生器空间。
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Numerical Analysis of Magnetic Field Effect on Ferro Particle Suspended Nanofluid Filled Square Enclosure Consist of Heat Generating Body
In presents of a magnetic field, an enclosure filled with ferro-particle suspended nanofluid is subjected to a numerical analysis to investigate natural convective heat transfer. At the center of the enclosure is a heat conducting and generating solid body, and the enclosure is influenced by four different thermal boundary conditions. To solve the governing equation, a Fortran algorithm based on the finite volume approach was created. The numerical approach used in this study produces consistent results for a variety of non-dimensional parameters like Rayleigh number (104 ≤ Ra ≤ 106), Hartmann number (0 ≤ Ha ≤ 100), solid volume fraction (0 ≤ φ ≤ 0.2) and distributed wall temperature. Streamlines, isotherms, and the Nusselt number graph are used to describe the flow and heat transfer properties. Based on this study, It has been noted that improved heat transfer for lower Hartmann number with higher Rayleigh number particularly along sinusoidal wall. For the low Hartmann number, the fluid flow enhances for higher Rayleigh number. In particular, the presence of ferro-particle suspended nanofluid enhances the heat transfer rate. Moreover, this study has found that the inclusion of magnetic fields and nanoparticles can increase heat transfer by up to 60%. The suggested methods in this research can assist manufacturers improve efficiency without increasing heat generator space in industrial applications for cooling or heating.
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来源期刊
Journal of Nanofluids
Journal of Nanofluids NANOSCIENCE & NANOTECHNOLOGY-
自引率
14.60%
发文量
89
期刊介绍: Journal of Nanofluids (JON) is an international multidisciplinary peer-reviewed journal covering a wide range of research topics in the field of nanofluids and fluid science. It is an ideal and unique reference source for scientists and engineers working in this important and emerging research field of science, engineering and technology. The journal publishes full research papers, review articles with author''s photo and short biography, and communications of important new findings encompassing the fundamental and applied research in all aspects of science and engineering of nanofluids and fluid science related developing technologies.
期刊最新文献
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