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首页> 外文期刊>Special topics & reviews in porous media >NUMERICAL AND EXPERIMENTAL INVESTIGATIONS ON THE ELECTRICAL CONDUCTIVITY OF FOAM MATERIALS
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NUMERICAL AND EXPERIMENTAL INVESTIGATIONS ON THE ELECTRICAL CONDUCTIVITY OF FOAM MATERIALS

机译：泡沫材料电导率的数值和实验研究

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The electrical conductivity of three-dimensional (3D) foam materials is investigated both numerically and experimentally in this work. Four types of 3D models, including the simple cubic skeleton model, tetrakaidecahedron skeleton model, and the body-centered and face-centered structure models are proposed to predict the electrical conductivity of foam materials. These four models have all explicitly taken into account that the structure concept of foam materials and the numerical results based on them are found to be applicable to multiple sets of experimental results. The finite-element analysis results indicate that the electrical conductivity (pT) of foam materials is generally increased with the increase of their solid volume fractions (f). Moreover, the correlation between the relative electrical conductivity and the volume fraction of foam materials can be described by a general equation, but with different constant values for different structure models. This general relation allows us to accurately and handily estimate the electrical conductivity of the majority of foam materials. It may also provide a way to choose the required empirical correlation in determining the electrical conductivity of different foam structures.
机译：在这项工作中，对三维（3D）泡沫材料的电导率进行了数值和实验研究。提出了四种类型的3D模型，包括简单的立方骨架模型，四十二面体骨架模型以及以身体为中心和以脸为中心的结构模型，以预测泡沫材料的电导率。这四个模型都明确考虑到泡沫材料的结构概念和基于它们的数值结果可用于多组实验结果。有限元分析结果表明，泡沫材料的电导率（pT）通常随其固体体积分数（f）的增加而增加。而且，相对电导率和泡沫材料的体积分数之间的相关性可以通过一个通用方程来描述，但是对于不同的结构模型具有不同的恒定值。这种一般关系使我们能够准确，方便地估算大多数泡沫材料的电导率。它也可以提供一种在确定不同泡沫结构的电导率时选择所需的经验相关性的方法。

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