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变截面纳米线声子输运蒙特卡洛模拟 被引量:2

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摘要 采用蒙特卡洛(MC)方法建立了声子在变截面硅纳米线内的输运模型,以渐扩几何体与渐缩几何体为物理模型,分别研究了在等热量与非等热量输入条件下2种模型的热整流效应和声子的输运特性.模拟结果表明在2种条件下,渐缩模型的热传导性能均高于渐扩模型.在非等热量输入的条件下,渐缩模型的热整流效应要大于等热量输入条件下的热整流效应.2种物理模型的主要区别在于体积的分布不同,虽然在纳米尺度下边界散射作用明显,但模拟结果表明边界散射对热传导的影响小于质量分布不同对声子输运的影响.
出处 《中国科学:技术科学》 EI CSCD 北大核心 2010年第3期231-236,共6页 Scientia Sinica(Technologica)
基金 国家教育部博士点基金(批准号:20050286019) 国家自然科学基金(批准号:50676019)资助项目
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同被引文献21

  • 1袁世平,姜培学.固态金属中声子热传递的分子动力学模拟研究[J].工程热物理学报,2005,26(z1):175-178. 被引量:4
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  • 10高庆福,张长瑞,冯坚,武纬,冯军宗.氧化铝气凝胶复合材料的制备与隔热性能[J].国防科技大学学报,2008,30(4):39-42. 被引量:22

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