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首页> 外文期刊>International Journal of Heat and Mass Transfer >Radiative transfer within non Beerian porous media with semitransparent and opaque phases in non equilibrium: Application to reflooding of a nuclear reactor
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Radiative transfer within non Beerian porous media with semitransparent and opaque phases in non equilibrium: Application to reflooding of a nuclear reactor

机译：在非平衡状态下具有半透明和不透明相的非比尔安多孔介质内的辐射传递：应用于核反应堆的回注

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摘要

A local radiative transfer model is developed for strongly anisotropic porous media with an opaque phase and a mixture of two semitransparent phases. At the optically thick limit, the homogenized phase associated with the opaque interfaces is characterized by generalized extinction and scattering coefficients at equilibrium, a phase function and an effective refraction index, by following the model of Taine et al. [1] for non Beerian media. The radiative transfer model is based on a Radiative Transfer Equation (RTE) with three source terms, which are associated with the temperature fields of the opaque interfaces and the two semitransparent phases. This RTE has been solved by a perturbation technique, which allows radiative interfacial fluxes and radiative powers per unit volume, that are exchanged between phases, to be computed at local scale. The main contributions are obtained at zeroth order perturbation. Corrective contributions at first order perturbation are also determined: Radiative fluxes and powers are then expressed from coupled Fourier's laws, which are characterized by radiative conductivity tensors associated with each phase. Illustrative results are given for the radiative modeling of reflooding of a damaged nuclear reactor core. Pragmatic conclusions on the cooling efficiency by steam and water droplets are finally given.
机译：针对具有不透明相和两个半透明相的混合物的强各向异性多孔介质，建立了局部辐射传递模型。在光学厚度极限处，遵循Taine等人的模型，与不透明界面相关的均质相的特征在于平衡时的消光和散射系数，相函数和有效折射率。 [1]适用于非比尔安媒体。辐射传递模型基于具有三个源项的辐射传递方程（RTE），这三个源项与不透明界面的温度场和两个半透明相相关。此RTE已通过微扰技术解决，该技术允许在局部范围内计算相之间交换的每单位体积的辐射界面通量和辐射功率。主要贡献是在零阶扰动下获得的。还确定了一阶扰动的校正作用：然后从耦合傅立叶定律表达辐射通量和功率，这些定律的特征是与每个相相关的辐射电导张量。给出了对损坏的核反应堆堆芯进行回采的辐射模型的说明性结果。最后给出了蒸汽和水滴冷却效率的实用结论。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第14期|p.3666-3676|共11页
  • 作者

    Miloud Chahlafi; Fabien Bellet; Florian Fichot; Jean Taine;

  • 作者单位

    CNRS, UPR 288, Laboratoire d'Energetique Moleculaire et Macmscopique, Combustion (EM2C), ECP, Batiment Peclet, 92295 Chatenay-Malabry, France,Ecole Centrale Paris, Batiment Peclet, F-92295 Chatenay-Malabry, France,Institut de Radioprotection et de Surete Nucleaire, Cadarache BP3, 13115 Saint-Paul-Lez-Durance Cedex, France;

    CNRS, UPR 288, Laboratoire d'Energetique Moleculaire et Macmscopique, Combustion (EM2C), ECP, Batiment Peclet, 92295 Chatenay-Malabry, France,Ecole Centrale Paris, Batiment Peclet, F-92295 Chatenay-Malabry, France;

    Institut de Radioprotection et de Surete Nucleaire, Cadarache BP3, 13115 Saint-Paul-Lez-Durance Cedex, France;

    CNRS, UPR 288, Laboratoire d'Energetique Moleculaire et Macmscopique, Combustion (EM2C), ECP, Batiment Peclet, 92295 Chatenay-Malabry, France,Ecole Centrale Paris, Batiment Peclet, F-92295 Chatenay-Malabry, France;

  • 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

    statistical homogenization; monte carlo simulation; non beerian porous medium; non equilibrium; perturbation technique;

    机译：统计同质化;蒙特卡洛模拟非比尔森多孔介质;非平衡摄动技术;

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