Ballistic-diffusive heat conduction in multiply-constrained nanostructures
作者: Yu-Chao HuaBing-Yang Cao
作者单位: 1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
刊名: International Journal of Thermal Sciences, 2016, Vol.101 , pp.126-132
来源数据库: Elsevier Journal
DOI: 10.1016/j.ijthermalsci.2015.10.037
关键词: Thermal conductivityNanostructuresPhonon Boltzmann transport equationMonte Carlo simulation
原始语种摘要: Abstract(#br)Ballistic-diffusive heat conduction in multiply-constrained nanostructures is theoretically studied based on the phonon Boltzmann transport equation. The results show that different constraints influence the thermal transport in different ways. In the direction parallel to the heat flow, the phonon ballistic transport can cause temperature jumps at the boundaries in contact with the phonon baths. In contrast, for lateral constraint, the heat flux is reduced near the boundaries due to phonon-boundary scattering. A thermal conductivity model for multiply-constrained nanostructures is then derived from the phonon Boltzmann transport equation. The influences of different constraints are combined on the basis of Matthiessen's rule. The model accurately characterizes the thermal...
全文获取路径: Elsevier  (合作)
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来源刊物:
影响因子:2.47 (2012)

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关键词翻译
关键词翻译
  • diffusive 扩散的
  • constrained 约束
  • multiply 增大
  • conduction 导电