| 铂薄膜导热特性的分子动力学模拟 |
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| 引用本文： | 黄小鹏,淮秀兰,邹玉.铂薄膜导热特性的分子动力学模拟[J].工程热物理学报,2009,30(9). |
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| 作者姓名： | 黄小鹏 淮秀兰 邹玉 |
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| 作者单位： | 1. 中国科学院工程热物理所,北京,100190;中国科学院研究生院,北京,100190
2. 中国科学院工程热物理所,北京,100190 |
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| 摘 要： | 采用非平衡态分子动力学(NEMD)方法模拟分析了纳米铂(Pt)薄膜的导热性能与脉冲激光作用下的温度响应特性.结果表明,100～500 nm铂薄膜的法向导热系数比体材料值低很多,而且低于其面向导热系数;微米铂薄膜的温度响应时间在纳秒量级;在脉冲加热的初始阶段,有一快速非傅立叶热波沿铂薄膜的厚度方向传递.
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| 关 键 词： | 导热系数 薄膜 分子动力学模拟 尺度效应 |
MOLECULAR DYNAMICS SIMULATION OF HEAT CONDUCTION CHARACTERISTICS OF PLATINUM NANOFILM |
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| HUANG Xiao-Peng,HUAI Xiu-Lan,ZOU Yu.MOLECULAR DYNAMICS SIMULATION OF HEAT CONDUCTION CHARACTERISTICS OF PLATINUM NANOFILM[J].Journal of Engineering Thermophysics,2009,30(9). |
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| Authors: | HUANG Xiao-Peng HUAI Xiu-Lan ZOU Yu |
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| Abstract: | Nonequilibrium molecular dynamics simulations are employed to explore the heat conduction and the temperature response characteristics of a platinum nanofilm.It shows that with the thickness between 100 nm and 500 nm the cross-plane thermal conductivity of platinum nanofilm is much lower than the bulk value,and also lower than the in-plane thermal conductivity. The results also indicate that the temperature response time in platinum film with micrometer thickness is in a nanosecond magnitude.It is also found that at the initial stage of pulse heating,there is a faster Non-Fourier heat wave across the film. |
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| Keywords: | thermal conductivity nanofilm molecular dynamics simulation size effect |
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