球形氧化铝填料高填充复合材料传热数值模拟

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2025-01-25 DOI:10.1016/j.compscitech.2025.111064

Ruoyu Zong , Bin Liu , Shijun Wang , Xiao Jia , Shikun Li , Xiulan Huai

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引用次数: 0

摘要

采用基于分子动力学的修正顺序吸收（MSA）算法，建立了含高体积分数Al2O3/SR球形填料（62.41 vol%）的三维模型，模拟了复合材料的热性能。通过颗粒接触概率定量表征材料内部导热通道的形成概率，其中有效接触由无量纲综合影响参数确定。研究了体积分数、填料之间的接触情况、界面热阻和二元填充方式对复合材料导热性能的影响。增加体积分数可以显著提高复合材料的导热性。然而，填料-填料接触和填料-基体接触的改进收益较小。在不同体积分数下，复合材料的最佳小颗粒比例呈现一致性，复合材料的导热系数随两种粒径填料直径比的增加而稳步增加。这项工作有助于理解复合材料的导热机理，指导复合材料的性能优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Numerical simulation of heat transfer of highly filled composites with spherical alumina fillers

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Numerical simulation of heat transfer of highly filled composites with spherical alumina fillers

By employing the molecular dynamics based Modified Sequential Absorption (MSA) algorithm, the 3D models containing high volume fraction spherical

{Al}_{2} O_{3} / SR

fillers (up to 62.41 vol%) were established for simulating the thermal performances of the composites. The formation probability of thermal conductive pathway inside the material was quantitatively characterized by the particle contact probability, where the effective contact was determined by a dimensionless comprehensive influencing parameter. Then, the effects of volume fraction, contact situation between fillers, interfacial thermal resistance, and the binary filling scheme on thermal conductivity of the composite material were investigated. Increasing the volume fraction can remarkably improve the thermal conductivity of composite materials. However, improvement of filler-filler contact and the filler-matrix contact shows less profit. The optimal proportion of small particles in the binary mixtures shows consistency at different volume fractions and the thermal conductivity of the composites steadily increases with the increase of the diameter ratio of two-sized fillers. This work is beneficial to understand the thermal conductive mechanism and guide the performance optimization of composites.

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.