Reversal of thermal rectification in one-dimensional nonlinear composite system

Using nonequilibrium molecular dynamics simulations, a comprehensive study of the asymmetric heat conduction in the composite system consisting of the Frenkel-Kontorova （FK） model and Fermi-Pasta-Ulam （FPU） model is conducted. The calculated results show that in a larger system, the rectifying direc...

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Bibliographic Details
Published in:Chinese physics B 2014-11, Vol.23 (11), p.348-353
Main Author: 詹斯琦 黄维清 黄桂芳
Format: Article
Language:English
Subjects:
Asymmetry
Conduction
Dynamical systems
Heat conduction
Heat transfer
Molecular dynamics
Nonlinear dynamics
Nonlinearity
Rectification
一维
分子动力学模拟
在系统
复合体系
整改
热传导
逆转
非线性
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Summary:Using nonequilibrium molecular dynamics simulations, a comprehensive study of the asymmetric heat conduction in the composite system consisting of the Frenkel-Kontorova （FK） model and Fermi-Pasta-Ulam （FPU） model is conducted. The calculated results show that in a larger system, the rectifying direction can be reversed only by adjusting the thermal bias. Moreover, the rectification reversal depends critically on the system size and the properties of the interface. The mechanisms of the two types of asymmetric heat conduction induced by nonlinearity are discussed. Considering the novel asymmetric heat conduction in the system, it may possess possible applications to manage the thermal rectification in situ directionally without re-building the structure.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/11/114401