论文标题
密封包装的准2D和3D热点系统中的非单调散热现象
Non-monotonic heat dissipation phenomenon in close-packed quasi-2D and 3D hotspot system
论文作者
论文摘要
基于声子Boltzmann传输方程，研究了密封包装的准2D纳米氨酸和3D纳米蛋白酶热点系统中的瞬时热量散热。发现在违反直觉上，散热效率不是相邻纳米级热源之间距离的单调函数：当此距离与声子平均自由路径相当时，热量耗散效率达到了最高值。这是由于两个热运输过程的竞争：quasiballistic传输从纳米级热源逃脱时，以及来自相邻纳米级热源的声子之间的散射。
Transient heat dissipation in close-packed quasi-2D nanoline and 3D nanocuboid hotspot systems is studied based on phonon Boltzmann transport equation. It is found that, counter-intuitively, the heat dissipation efficiency is not a monotonic function of the distance between adjacent nanoscale heat sources: the heat dissipation efficiency reaches the highest value when this distance is comparable to the phonon mean free path. This is due to the competition of two thermal transport processes: quasiballistic transport when phonons escape from the nanoscale heat source and the scattering among phonons originating from adjacent nanoscale heat source.
