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Natural convection in an enclosure with a localized nonuniform heat source on the bottom wall

机译：底壁上有局部不均匀热源的外壳中的自然对流

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摘要

Natural convection in an air filled enclosure with a localized nonuniform heat source mounted centrally on the bottom wall is numerically investigated. The vertical walls are cooled while the top wall and the remaining portions of the bottom wall are insulated. The heat source is assumed to be isothermal with a linearly varying temperature. The governing equations were solved using finite volume method on a uniformly staggered grid system. The computational results are presented in the form of isotherm and streamline plots and Nusselt numbers. The effects of the source nonuniformity parameter, λ and the line source length, e are investigated for the Grashof numbers Cr = 10~6 and 10~7. It is found that for Cr-10~5 nonuniform heating of the line source enhances the overall heat transfer rate markedly compared to uniform heating of the heat source whereas for Cr=10~7 its effect is marginal.
机译：数值研究了在空气填充的机壳内自然对流的情况，该机壳的底壁居中安装了局部不均匀的热源。垂直壁被冷却，而顶壁和底壁的其余部分被绝缘。假设热源是等温的，并且温度呈线性变化。在均匀交错网格系统上使用有限体积法求解了控制方程。计算结果以等温线，流线图和努塞尔数表示。对于格拉斯霍夫数Cr = 10〜6和10〜7，研究了源不均匀性参数λ和线源长度e的影响。发现对于Cr-10〜5，线源的不均匀加热与热源的均匀加热相比，显着提高了总传热速率，而对于Cr = 10〜7，其影响很小。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第14期|p.2820-2828|共9页
  • 作者

    S. Saravanan; C. Sivaraj;

  • 作者单位

    Department of Mechanical Engineering, llmenau University of Technology, P.O. Box 100565, 98693 llmenau, Germany,Department of Mathematics, Bharathiar University, Coimbatore, Tamil Nadu, India;

    Department of Mathematics, Bharathiar University, Coimbatore, Tamil Nadu, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    natural convection enclosure line source;

    机译：自然对流外壳线源;

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