超长窄导体中边界散射对传热的异常依赖性

Pub Date : 2024-05-01 DOI:10.1063/10.0025618
J. Amrit, Ye. Nemchenko, K. Nemchenko, I. Kudryavtsev, S. Rogova, M. Spotar, T. Vikhtinskaya
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引用次数: 0

摘要

在对纳米带的传热进行建模时,发现热通量以及导热系数与来自侧边界的声子反射的镜面反射程度有异常密切的关系。根据数值计算,增加最小弥散散射应导致导体热阻突然增加。鉴于在纳米技术中选择最佳热参数的重要性,这篇短文对所发现的依赖关系进行了分析,讨论了这种反常行为的物理原因,并得出结论:必须保证纳米导体界面的质量,以创建具有给定或最佳热导率的热接触。
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Unusual heat transfer dependence on boundary scattering in very long narrow conductors
When modeling heat transfer in nanoribbons, an unusually sharp dependence of the heat flux, and, consequently, the thermal conductivity coefficient, on the degree of specularity of phonon reflection from the lateral boundaries was found. From numerical calculations, it followed that the addition of minimally diffuse scattering should lead to an abrupt increase in the thermal resistance of the conductor. Given the importance of selecting optimal thermal parameters in nanotechnology, this short paper provides an analysis of the found dependencies, discusses the physical reasons for this anomalous behavior, and draws conclusions about the importance of achieving the quality of the nanoconductor interface to create thermal contacts with a given or optimal thermal conductivity.
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