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Molecular Dynamics Simulations of Diffusive-Ballistic Heat Conduction in Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Junichiro Shiomi  and
Shigeo Maruyama
Junichiro Shiomi
Affiliation:
[email protected], University of Tokyo, Department of Mechanical Engineering, 7-3-1 Hongo, Bunkyo-ku, Tokyo, N/A, Japan, +81358416408
Shigeo Maruyama
Affiliation:
[email protected], University of Tokyo, Department of Mechanical Engineering, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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Abstract

Heat conduction of finite-length single-walled carbon nanotubes (SWNTs) has been studied by means of non-equilibrium molecular dynamics (MD) simulations. The length-dependence of the thermal conductivity was quantified for a range of nanotube-lengths at room temperature. The length dependence of thermal conductivity exhibits a gradual transition from nearly pure ballistic heat conduction to diffusive-ballistic heat conduction. The results show that the thermal conductivity profile does not converge even beyond a micrometer nanotube-length. Furthermore, the diameter dependence suggests that the phonon diffusion is reduced with the diameter.

Keywords

nanoscalethermal conductivitysimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1022: Symposium II – Nanoscale Heat Transport–From Fundamentals to Devices , 2007 , 1022-II05-03
Copyright
Copyright © Materials Research Society 2007

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