Phonon Transport Across Mesoscopic Constrictions

被引：16

作者：

Singh, Dhruv ^{[2
,3
]}

Murthy, Jayathi Y. ^{[1
]}

Fisher, Timothy S. ^{[1
]}

机构：

[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

[2] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

[3] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

来源：

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 2011年 / 133卷 / 04期

关键词：

Boltzmann transport equation; constriction resistance; ballistic-diffusive transition; gas gap conductance; slip flow and heat transfer; Knudsen number; temperature jump; THERMAL CONTACT RESISTANCE; FIELD-EFFECT TRANSISTORS; HEAT-TRANSFER; CONDUCTIVITY; SILICON;

D O I：

10.1115/1.4002842

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Phonon transport across constrictions formed by a nanowire or a nanoparticle on a substrate is studied by a numerical solution of the gray Boltzmann transport equation (BTE) resolving the effects of two length scales that govern problems of practical importance. Predictions of total thermal resistance for wire/substrate and particle/substrate combinations are made for the entire range of Knudsen number, with an emphasis on resolving transport in the mesoscopic regime where ballistic-diffusive mechanisms operate and analytical expressions are not available. The relative magnitudes of bulk and constriction resistance are established, and a correlation for overall thermal resistance spanning the range of practical Knudsen numbers is provided. [DOI: 10.1115/1.4002842]

引用

页数：8

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