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Natural Convection in a Differentially Heated Cavity with Parallel Heat-Generating Baffles

机译：带有平行生热挡板的差热腔中的自然对流

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摘要

Natural convection in a horizontal differentially heated square cavity containing two vertical heat generating baffles is studied numerically. The baffles are assumed to generate heat uniformly at the same or different rates. Asymptotic steady-state results for the vorticity-stream function formulation are presented in the form of streamline and isotherm plots. The fluid flow, heat transfer, and average Nusselt number are investigated for different heat generation ratios and spacing between the baffles. Convection within the cavity gets augmented for increasing values of heat generation ratio. When the two baffles are located very near the cavity walls, an increase in heat generation ratio induces a strong buoyancy convective flow. When they are very close to each other an increase in heat generation ratio strengthens the innermost cell around the baffles, which in turn drives the global flow at a faster rate through a pair of intermediate inner cells. It is found that the blocking effect of the baffles strongly depends on heat generation ratio and spacing between the baffles. The heat transfer rate varies nonlinearly against spacing between the baffles, and the possible physical reason is given.
机译：对包含两个垂直生热挡板的水平差加热方腔中的自然对流进行了数值研究。假定折流板以相同或不同的速率均匀地产生热量。涡流函数公式的渐近稳态结果以流线图和等温线图的形式给出。对于不同的生热比和挡板之间的间距，研究了流体流动，传热和平均努塞尔数。腔内的对流会增加，以增加热量的产生率。当两个挡板位于腔壁附近时，生热比的增加会引起强烈的浮力对流。当它们彼此非常靠近时，生热率的增加会增强挡板周围的最内层单元，从而依次以更快的速度驱动整体流通过一对中间内部单元。已经发现，挡板的阻挡效果在很大程度上取决于热量的产生比例和挡板之间的间距。传热速率相对于挡板之间的间距呈非线性变化，并给出了可能的物理原因。

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  • 来源
    《Heat Transfer Engineering》 |2012年第15期|p.1264-1271|共8页
  • 作者

    SHANMUGAM SARAVANAN; CHINNASAMY SIVARAJ;

  • 作者单位

    Department of Mathematics, Bharathiar University, Coimbatore 641046, 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);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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