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Coupled radiation and solidification heat transfer inside a graded index medium by finite element method

机译：梯度折射率介质内部辐射与凝固耦合传热的有限元方法

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摘要

Effects of thermal radiation on solidification heat transfer must be considered inside semitransparent media. This paper investigates coupled heat transfer of solidification and radiation within a two-dimensional rectangular semitransparent medium having gradient index. Solidification process is supposed to happen at some temperature range, and accordingly three zones including liquid-, solid- and mushyzones exist in phase-change media. In different phase field, parameters of thermophysical property are assumed different and those of radiative property are assumed same. Governing equation includes conduction, radiation and phase-change terms, and radiation and phase-change are treated as source terms in the equation, respectively. A Galerkin finite element method is used to solve energy equation of coupled radiation and phase-change heat transfer. This paper analyzes effect of thermal radiation on phasechange heat transfer and those of refractive index distributions on temperature fields and liquid fraction distributions during radiation-solidification coupled heat transfer. From the results, we can find that refractive index gradient has a major influence on phase-change process and compared with the case of smaller index gradient, bigger gradient can speed up phase-change heat transfer in semitransparent media.
机译：半透明介质内部必须考虑热辐射对固化传热的影响。本文研究了具有梯度指数的二维矩形半透明介质中凝固与辐射的耦合传热。凝固过程应该在某个温度范围内发生，因此相变介质中存在三个区域，包括液体区，固体区和糊状区。在不同的相场中，热物理性质的参数被假定为不同，而辐射性质的参数被假定为相同。控制方程式包括传导项，辐射项和相变项，并且辐射项和相变项分别视为方程式中的源项。运用Galerkin有限元方法求解耦合辐射和相变传热的能量方程。本文分析了辐射固结耦合传热过程中热辐射对相变传热的影响以及折射率分布对温度场和液体分数分布的影响。从结果可以发现，折射率梯度对相变过程具有重要影响，与较小的折射率梯度相比，较大的梯度可以加速半透明介质中的相变传热。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第14期|p.3090-3095|共6页
  • 作者

    Hong-Liang Yi; He-Ping Tan; Yu Zhou;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, PR China,School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, PR China;

    School of Materials Science and Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Harbin 150001, PR 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

    semitransparent medium gradient refractive index solidification thermal radiation finite element method;

    机译：半透明介质梯度折射率凝固热辐射有限元法;

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