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首页> 外文期刊>Heat Transfer Engineering >Effect of Radiation on Mixed Convection Inside a Lid-Driven Square Cavity With Various Optical Thicknesses and Richardson Numbers
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Effect of Radiation on Mixed Convection Inside a Lid-Driven Square Cavity With Various Optical Thicknesses and Richardson Numbers

机译：辐射对具有不同光学厚度和理查森数的盒盖驱动方腔内混合对流的影响

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摘要

This work studies numerically the effect of the radiative heat transfer on the flow and thermal behaviors of the mixed convection in a lid-driven square cavity in the presence of radiatively emitting, absorbing, and isotropically scattering gray medium. The Boussinesq approximation has been used in modeling the governing equations, and the SIMPLE (semi-implicit method for pressure-linked equations) algorithm is used in coupling the velocity and pressure fields. The radiative transfer equation and the governing equations have been solved respectively by the discrete ordinates method and the finite-volume method in order to obtain the temperature, velocity, and heat flux distributions in the participating medium. The present numerical simulations are validated by comparison with several earlier studies. Then, the temperature and velocity distributions and Nusselt numbers have been analyzed in a broad range of optical thicknesses from 0 to 100 and Richardson numbers from 0.01 to 100. The results show that the radiation has a significant role on the flow and thermal behaviors in the lid-driven square cavity. As an example, we can refer to a sweep behavior that is detected in the velocity distributions of the lid-driven cavity.
机译：这项工作在辐射发射，吸收和各向同性散射的灰色介质存在下，数值研究了辐射热传递对盖驱动方腔中混合对流的流动和热行为的影响。 Boussinesq逼近已用于控制方程的建模，SIMPLE（压力链接方程的半隐式方法）算法用于耦合速度和压力场。为了获得参与介质中的温度，速度和热通量分布，分别通过离散坐标法和有限体积法分别求解了辐射传递方程和控制方程。通过与几个较早的研究进行比较，验证了当前的数值模拟。然后，分析了光学厚度从0到100和Richardson数从0.01到100的较宽光学厚度范围内的温度和速度分布以及Nusselt数。结果表明，辐射对光子的流动和热行为具有重要作用盖子驱动的方腔。例如，我们可以参考在盖驱动腔的速度分布中检测到的扫掠行为。

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  • 来源
    《Heat Transfer Engineering》 |2017年第8期|653-665|共13页
  • 作者

    Malihe Mohammadi; Seyyed Abdolreza Gandjalikhan Nassab;

  • 作者单位

    Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;

    Department of Mechanical Engineering, School of Engineering, Shahid Bahonar University of Kerman, Kerman, 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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