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首页> 外文期刊>Heat Transfer Engineering >Natural Convection Heat Transfer and Entropy Generation in a Porous Trapezoidal Enclosure Saturated with Power-Law Non-Newtonian Fluids
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Natural Convection Heat Transfer and Entropy Generation in a Porous Trapezoidal Enclosure Saturated with Power-Law Non-Newtonian Fluids

机译：多孔梯形外壳中的自然对流热传递和熵产生，饱和电力 - 非牛顿流体饱和

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摘要

In the present study, natural convection heat transfer and its associated entropy generation in a porous trapezoidal enclosure saturated with a power-law non-Newtonian fluid has been numerically investigated. Horizontal walls of the enclosure are assumed to be adiabatic while the side walls are considered to be kept at a constant temperature. A continuum-based approach is adapted here to model the fluid flow through porous media and the Darcy's law is modified to account for non-Newtonian rheological behavior of the fluid. The obtained governing equations are discretized using the finite volume method and a detailed parametric study is undertaken to account for the effects of various relevant parameters of the problem on the heat transfer and entropy generation rates. It was shown that the impact of the power-law index on both entropy generation and heat transfer significantly intensifies in a convection-dominated flow regime inside the enclosure, especially for a shear thinning liquid. Moreover, heat transfer rate and entropy generation increase as the sidewall angle is elevated.
机译：在本研究中，已经在数值上研究了在多孔梯形外壳中进行的自然对流传热及其相关的熵产生。假设外壳的水平壁是绝热的，而侧壁被认为保持在恒定温度下。此处适用于基于连续的方法，以通过多孔介质来模拟流体流动，并且达西法则被修改以考虑流体的非牛顿流变行为。使用有限体积法离散化的控制方程，并进行详细的参数研究，以解释各种相关参数对传热和熵产生率的各种相关参数的影响。结果表明，幂律指数对熵产生和热传递的影响显着强化了外壳内的对流主导的流动制度，特别是对于剪切稀疏液体。此外，随着侧壁角度升高，传热速率和熵产生增加。

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  • 来源
    《Heat Transfer Engineering》 |2020年第14期|982-1001|共20页
  • 作者

    Kaveh Yazdani; Mohammad Sahebjamei; Ali Ahmadpour;

  • 作者单位

    Department of Mechanical Engineering Amirkabir University of Technology Tehran Iran;

    Department of Mechanical Engineering Amirkabir University of Technology Tehran Iran;

    Department of Mechanical Engineering Amirkabir University of Technology Tehran Iran;

  • 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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