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首页> 外文期刊>Heat Transfer Engineering >Buoyancy Induced Heat Transfer Flow Inside a Tilted Square Enclosure Filled with Nanofluids in the Presence of Oriented Magnetic Field
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Buoyancy Induced Heat Transfer Flow Inside a Tilted Square Enclosure Filled with Nanofluids in the Presence of Oriented Magnetic Field

机译：在定向磁场作用下，充满纳米流体的可倾斜方形外壳内部浮力引起的传热流

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摘要

This paper analyzes heat transfer and fluid flow of natural convection in an inclined square enclosure filled with different types of nanofluids having various shapes of nanoparticles in the presence of oriented magnetic field. The Galerkin weighted residual finite element method has been employed to solve the governing non-dimensional partial differential equations. In the numerical simulations, water, ethylene glycol, and engine oil containing copper, alumina, titanium dioxide nanoparticles are considered. The effects of model parameters such as Rayleigh number, Hartmann number, nanoparticles volume fraction, magnetic field inclination angle, geometry inclination angle on the fluid flow and heat transfer are investigated. The results indicate that increment of the Rayleigh number and nanoparticle volume fraction increase the heat transfer rate in a significant way, whereas, increment of the Hartmann number decreases the overall heat transfer rate. It is also observed that a blade shape nanoparticle gives higher heat transfer rate compared to other shapes of nanoparticles. The critical geometry inclination angle at which the maximum heat transfer rate is achieved depends on the nanoparticle volume fraction as well as on the magnetic field orientation. These results are new and have direct applications in solar thermal collectors and thermal insulator of buildings.
机译：本文分析了在定向磁场存在的情况下，在充满不同类型纳米流体的倾斜方形外壳中自然对流的热传递和流体流动，该纳米流体具有各种形状的纳米颗粒。已采用Galerkin加权残差有限元方法来求解控制的无量纲偏微分方程。在数值模拟中，考虑了水，乙二醇和包含铜，氧化铝，二氧化钛纳米粒子的机油。研究了诸如瑞利数，哈特曼数，纳米颗粒体积分数，磁场倾角，几何倾角等模型参数对流体流动和传热的影响。结果表明，瑞利数和纳米颗粒体积分数的增加显着提高了传热速率，而哈特曼数的增加则降低了总传热速率。还观察到，与其他形状的纳米颗粒相比，叶片形状的纳米颗粒具有更高的传热速率。实现最大传热速率的临界几何形状倾斜角取决于纳米颗粒的体积分数以及磁场方向。这些结果是新的，可直接应用于建筑物的太阳能集热器和绝热体。

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  • 来源
    《Heat Transfer Engineering》 |2018年第8期|511-525|共15页
  • 作者

    Khamis S. Al Kalbani; Mohammad M. Rahman; Md. Shariful Alam; Nasser Al-Salti; Ibrahim A. Eltayeb;

  • 作者单位

    Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman;

    Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman;

    Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman;

    Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman;

    Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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