基于碎片的热导电性预测建模,用于封闭的半孔聚合物凝
Haiyan Yu1, Mingdong Li1, Ning Guo1
1Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China.
Gels (Basel, Switzerland)
|June 25, 2025
概括
这项研究提出了一种新的模型,用于预测半孔聚合物凝的隔热性能. 该模型准确地预测了热性能,确定了可孔性和细胞大小的最佳范围,以提高热管理.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 应用物理 应用物理
背景情况:
- 封闭的中孔聚合物凝是先进的绝热材料.
- 轻量特性和热管理是关键特性.
- 准确预测热性能对于材料设计至关重要.
研究的目的:
- 开发一种新的数学模型,用于预测封闭的半孔聚合物凝的热性能.
- 为了整合碎形几何学,Kirchhoff的原理,罗斯兰近似和Mie散射理论.
- 分析各种参数对导热率的影响.
主要方法:
- 开发了一个数学模型,结合了碎形几何学,Kirchhoff的导热原理,罗斯兰扩散近似和Mie散射理论.
- 基于对角交叉碎形结构的导电热导率.
- 考虑微尺度辐射效应的衍生辐射导热率.
主要成果:
- 模型预测显示,与中孔聚合物凝实验结果有很强的一致性 (预测误差<11.2%).
- 参数分析揭示了多孔度,细胞大小,温度,折射率和灭绝系数的影响.
- 确定了细胞大小 (1-100微米) 和多孔度 (0.74-0.97) 的临界范围,以达到最小的导热率.
结论:
- 拟议的模型提供了一个强大的理论工具,用于预测隔热性能.
- 该模型有助于设计和优化用于热管理的半孔聚合物凝.
- 这些发现推动了这些材料在能源转换和管理系统中的应用.
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