ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Reversal of thermal rectification in one-dimensional nonlinear composite system |
Zhan Si-Qi (詹斯琦), Huang Wei-Qing (黄维清), Huang Gui-Fang (黄桂芳) |
Department of Applied Physics, Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha 410082, China |
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Abstract 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.
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Received: 07 March 2014
Revised: 29 April 2014
Accepted manuscript online:
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PACS:
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44.10.+i
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(Heat conduction)
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05.70.Ln
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(Nonequilibrium and irreversible thermodynamics)
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63.20.Ry
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(Anharmonic lattice modes)
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Fund: Project supported by the Natural Science Foundation of Hunan Province, China (Grant No. 12JJ3009), the Changsha Science and Technology Plan Projects, China, and the Science and Technology Plan Projects of Hunan Province, China (Grant No. 2013SK3148). |
Corresponding Authors:
Huang Wei-Qing
E-mail: wqhuang@hnu.edu.cn
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Cite this article:
Zhan Si-Qi (詹斯琦), Huang Wei-Qing (黄维清), Huang Gui-Fang (黄桂芳) Reversal of thermal rectification in one-dimensional nonlinear composite system 2014 Chin. Phys. B 23 114401
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