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A novel effective medium theory for modelling the thermal conductivity of porous materials

机译:用于模拟多孔材料导热系数的新型有效介质理论

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摘要

A novel effective medium theory was proposed to model the thermal conductivity of porous materials. In this theory, phases(or components)are treated as small spheres dispersing into an assumed uniform medium with the thermal conductivity k_m. A simple algebraic expression for the thermal conductivity based on this theory was derived, in which each has a distinct physical basis. The expression can unify five basic structural models(Series, Parallel, two forms of Maxwell-Eucken, effective medium theory)through variations of k_m. Furthermore, the feasibility of the model was evaluated using the experimental data from previous literatures and those calculated by this model.
机译:提出了一种新颖的有效介质理论来模拟多孔材料的导热系数。在此理论中,将相(或组分)视为分散到热导率为k_m的假定均匀介质中的小球体。推导了基于该理论的导热系数的简单代数表达式,其中每个表达式都有独特的物理基础。该表达式可通过k_m的变化统一五个基本结构模型(系列,并行,两种形式的麦克斯韦-伊肯,有效介质理论)。此外,使用来自先前文献的实验数据以及由该模型计算出的实验数据来评估该模型的可行性。

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  • 作者单位

    State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China;

    School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, PR China;

    State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China;

    State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China;

    State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230027, 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

    Thermal conductivity; Porous materials; Effective medium theory; Models;

    机译:导热系数;多孔材料有效媒介理论;楷模;

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