| 粒径均匀散体导热系数的分形描述 |
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| 引用本文： | 赵晓彤,杨善让,徐志明,王建国,宋之平.粒径均匀散体导热系数的分形描述[J].工程热物理学报,1999(4). |
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| 作者姓名： | 赵晓彤 杨善让 徐志明 王建国 宋之平 |
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| 作者单位： | 东北电力学院动力系!吉林，132012(赵晓彤，杨善让，徐志明，王建国)，华北电力大学研究生部!北京，071003(宋之平) |
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| 基金项目： | 国家自然科学基金，东北电力学院科研基金 |
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| 摘 要： | 本文以分形理论为工具，采用填充率、散体颗粒直径等宏观易等测参数较准确地描述了颗粒散体的几何结构；运用导热与逾渗的类比，建立了均匀散体导热系数的逾渗模型，模型的预测值与实验测量结果基本一致。
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| 关 键 词： | 分形 散体 导热系数 逾渗 |
A FRACTAL MODEL FOR THERMAL CONDUCTIVITY IN DISPERSE SYETEM OF EVEN PELLETS |
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| ZHAO Xiaotong, YANG Shanrang, XU Zhiming, WANG Jianguo.A FRACTAL MODEL FOR THERMAL CONDUCTIVITY IN DISPERSE SYETEM OF EVEN PELLETS[J].Journal of Engineering Thermophysics,1999(4). |
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| Authors: | ZHAO Xiaotong YANG Shanrang XU Zhiming WANG Jianguo |
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| Abstract: | In this paper the geometrical structure of disperse system is described by fractal theory, which is based on the easily measurable parameters, such as, probability of occupy, the diameters of disperse pellet etc. A fractal model of thermal conductivity of disperse system with even pellet has been developed with the aid of the analogy between the heat conduction and the percolation. The measurement of the thermal conductivity in the disperse system was carried out by the method of cutout hot wire. The model's prediction as to the ratio of thermal conductivity for different pellet size is reasonably in agreement with the experimental result. |
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| Keywords: | fractal disperse system thermal conductivity percolation |
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