Thermal rectification of asymmetrically-defective materials

被引：8

作者：

Hayashi, Hiroyuki ^{[1
]}

Ito, Yohei ^{[1
]}

Takahashi, Koji ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Aeronaut & Astronaut, Fukuoka 8190395, Japan

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2011年 / 25卷 / 01期

基金：

日本学术振兴会;

关键词：

Anharmonic lattice model; Low dimensional material; Molecular dynamic simulation; Carbon nanotube; Thermal rectification; HEAT-CONDUCTION; DIMENSIONAL LATTICES; EQUILIBRIUM; TRANSPORT; DYNAMICS; CHAINS;

D O I：

10.1007/s12206-010-1008-x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

We conducted numerical simulations of heat conduction in one-dimensional (1D) nonlinear lattices to reveal the mechanism of thermal rectification of asymmetrically-defective materials. A decreased spring constant simulates the defective lattice and the obtained temperature profile suggests a thermal resistance existing at the interface of two linked segments with different spring constants. Our numerical results suggest that the thermal rectification of two-segment system is dependent on the spring constant and temperature gradient. Introducing the estimated phonon band, most of the rectification mechanisms are clearly explained and performance limit as a thermal rectifier is found for the defective/pristine materials.

引用

页码：27 / 32

页数：6

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