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首页> 外文期刊>Letters in heat and mass transfer >Numerical study of natural convection cooling of horizontal heat source mounted in a square cavity filled with nanofluid
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Numerical study of natural convection cooling of horizontal heat source mounted in a square cavity filled with nanofluid

机译：装在装有纳米流体的方腔中的水平热源自然对流冷却的数值研究

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摘要

This paper presents a numerical study of natural convection cooling of a heat source horizontally attached to the left vertical wall of a cavity filled with copper-water nanofluid. The left vertical wall is kept at the constant temperature, while the other ones are kept adiabatic. The numerical approach is based on the finite volume method with a collocated grid arrangement The SIMPLE algorithm is used for handling the pressure velocity coupling. In this study, the influence of some effective parameters such as: Rayleigh number, location and geometry of heat source and solid concentration are studied and discussed. Results are presented in the form of streamlines, isotherms, and average Nusselt number. The results show that dimension of the heat source is an important parameter affecting the flow pattern and temperature field, so that the average Nusselt number decreases with an increase in the length of the heater. It is also observed that at a given Rayleigh number and definite heat source geometry, the average Nusselt number increases linearly with the increase in the solid volume fraction of nanofluid. The increase of Rayleigh numbers strengthens the natural convection flows which leads to the decrease in heat source temperature. The algorithm and the computer code have been also compared with numerical results in order to verify and validate the model.
机译：本文提出了一个水平对接于装满铜水纳米流体的空腔左垂直壁的热源自然对流冷却的数值研究。左垂直壁保持恒温，而其他垂直壁保持绝热。数值方法基于有限体积方法，并排布置网格。SIMPLE算法用于处理压力速度耦合。在这项研究中，研究和讨论了一些有效参数的影响，例如：瑞利数，热源的位置和几何形状以及固体浓度。结果以流线，等温线和平均Nusselt数的形式表示。结果表明，热源的尺寸是影响流型和温度场的重要参数，因此平均努塞尔数随加热器长度的增加而减小。还观察到，在给定的瑞利数和确定的热源几何形状下，平均纳塞尔数随纳米流体固体体积分数的增加而线性增加。瑞利数的增加会增强自然对流，从而导致热源温度下降。还将该算法和计算机代码与数值结果进行了比较，以验证和验证该模型。

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  • 来源
    《Letters in heat and mass transfer》 |2010年第8期|p.1135-1141|共7页
  • 作者

    Amir Houshang Mahmoudi; Mina Shahi; Abbas Honarbakhsh Raouf; Ali Ghasemian;

  • 作者单位

    R&D department of Oghab Afshan Company, Semnan, Iran,Department of Mechanical Engineering, Faculty of Engineering, Semnan University, Semnan, Iran;

    Department of Mechanical Engineering, Faculty of Engineering, Semnan University, Semnan, Iran,University of Semnan, Central organization, Molavi Blvd,Saadi Sq. ,Semnan, Iran;

    Department of Metallurgical Engineering, Faculty of Engineering, Semnan University, Semnan, Iran;

    Department of Mechanical Engineering, Islamic Azad University of Semnan, Semnan, Iran;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    natural convection; numerical study; square cavity; nanofluid;

    机译：自然对流;数值研究方腔纳米流体;

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