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Numerical investigation of the phase change process of low melting point metal

机译：低熔点金属相变过程的数值研究

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摘要

Low melting point metals (LMPMs) are a new kind of phase change materials (PCMs) which exhibit excellent heat extraction capability due to their high thermal conductivity. Such a characteristic renders it distinctive melting mode which hardly exists in conventional paraffin PCMs. In this paper, comprehensive numerical investigation is carried out to reveal the melting process of LMPMs. First, comparative simulations of typical paraffin eicosane and typical LMPM gallium is conducted. Then, dimensionless analysis is performed based on a series of parametric studies and corresponding dimensionless correlations are given under both constant wall temperature condition and constant heat flux condition. Further, the critical dimensionless values within which the correlations are applicable are suggested. Finally, a preliminary exploration is performed to illustrate the influence of natural convection under relatively high Ra number condition. This study can serve as a valuable reference for future practical thermal design of LMPMs based thermal management systems and thermal energy storage systems.
机译：低熔点金属（LMPM）是一种新型的相变材料（PCM），由于其高导热性而具有出色的吸热能力。这样的特性使其具有独特的熔化模式，这在常规石蜡PCM中几乎不存在。在本文中，进行了全面的数值研究以揭示LMPM的熔化过程。首先，进行了典型石蜡二十烷和典型LMPM镓的对比模拟。然后，在一系列参数研究的基础上进行了无量纲分析，并在恒定壁温条件和恒定热通量条件下给出了相应的无量纲相关性。此外，建议了可应用相关性的临界无量纲值。最后，进行了初步探索，以说明在较高Ra数条件下自然对流的影响。该研究可以为基于LMPM的热管理系统和热能存储系统的未来实用热设计提供有价值的参考。

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  • 作者

    Xiao-Hu Yang; Si-Cong Tan; Jing Liu;

  • 作者单位

    Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;

    Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China,Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, 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

    Phase change material; Low melting point metal; Parametric numerical investigation; Dimensionless correlation;

    机译：相变材料;低熔点金属;参数数值研究;无量纲相关;

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