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首页> 外文期刊>Journal of Heat Transfer >A New Uniform Continuum Modeling of Conductive and Radiative Heat Transfer in Nuclear Pebble Bed
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A New Uniform Continuum Modeling of Conductive and Radiative Heat Transfer in Nuclear Pebble Bed

机译：核鹅卵石床上导电辐射传热的新均匀连续造型

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摘要

Radiative and conductive heat transfer is fairly important in the nuclear pebble bed. A continuum model is proposed here to derive the effective thermal conductivity (ETC) of pebble bed. It is a physics-based equation determined by the temperature, number density, heat transfer coefficient, and the radial distribution function (RDF). Based on a concept of continuum, this model considers the conduction and thermal radiation in nuclear pebble bed through a uniform framework and the results are in good agreement with the existing model and correlations. It indicates that the local temperature in the radiation case without internal heat sources is determined by all possible surrounding pebbles weighted by a radiative kernel function. The discrete element method (DEM) packing results are in good agreement with the solution of the continuum model. Both the conductive and radiative continuum models converge to the heat conduction in continuum mechanics at size factor mu 1.
机译：辐射和导电传热在核鹅卵石床上相当重要。这里提出了连续模型来得出鹅卵石床的有效导热率（ETC）。它是由温度，数浓度，传热系数和径向分布函数（RDF）确定的基于物理的等式。基于连续概念的概念，该模型通过统一框架考虑了核鹅卵石床中的导通和热辐射，结果与现有模型和相关性吻合良好。它表明，没有内部热源的辐射箱中的局部温度由由辐射内核功能加权的所有可能的围栏确定。离散元素方法（DEM）包装结果与连续体模型的解决方案吻合良好。导电和辐射连续型模型都会收敛到连续体型MU 1的连续力学中的热传导。

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  • 来源
    《Journal of Heat Transfer》 |2019年第8期|082001.1-082001.5|共5页
  • 作者

    Wu Hao; Gui Nan; Yang Xingtuan; Tu Jiyuan; Jiang Shengyao;

  • 作者单位

    Tsinghua Univ Key Lab Adv Reactor Engn & Safety Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl & New Energy Technol Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Key Lab Adv Reactor Engn & Safety Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl & New Energy Technol Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Key Lab Adv Reactor Engn & Safety Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl & New Energy Technol Minist Educ Beijing 100084 Peoples R China;

    Tsinghua Univ Key Lab Adv Reactor Engn & Safety Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl & New Energy Technol Minist Educ Beijing 100084 Peoples R China|RMIT Univ Sch Engn Melbourne Vic 3083 Australia;

    Tsinghua Univ Key Lab Adv Reactor Engn & Safety Collaborat Innovat Ctr Adv Nucl Energy Technol Inst Nucl & New Energy Technol Minist Educ Beijing 100084 Peoples R China;

  • 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

    nuclear pebble bed; continuum model; particle radiation; conduction; effective thermal conductivity; pebble flow;

    机译：核鹅卵石床;连续模型;粒子辐射;传导;有效的导热系数;卵石流动;

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