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Effect of radial heat conduction on effective thermal conductivity of carbon nanotube bundles

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Abstract

The effect of the radial heat conduction on the effective thermal conductivity of carbon nanotube (CNT) bundles is studied by the nonequilibrium molecular dynamics (NEMD) method. The hexagonal CNT bundle consists of seven (10, 10) single-walled carbon nanotubes (SWCNTs). The radial heat conduction is induced by creating the vacancy defects in some segments of the constituent CNTs. Combined with the temperature differences and the inter-tube thermal resistances at the different segments, the radial heat flow in the CNT bundle is calculated. The maximum percentage of the radial heat flow is less than 7% with the presence of four defective CNTs, while the resultant decrement of the effective thermal conductivity of the bundle is about 18%. The present results indicate that the radial heat flow can significantly diminish the axial heat conduction in the CNT bundles, which probably explains the smaller effective thermal conductivity in the CNT assemblies compared to that of the individual CNTs.

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Authors and Affiliations

  1. Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 210096, China

    JianLi Wang, YaMei Song, YuFeng Zhang, YuHan Hu, Hang Yin & YunFei Chen

  2. College of Electronic and Mechanical Engineering, Nanjing Forestry University, Nanjing, 210037, China

    YunFeng Gu

  3. Key Laboratory of Hydraulic Machinery Transients (Wuhan University), Ministry of Education, Wuhan, 430072, China

    Re Xia

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  1. JianLi Wang
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  2. YaMei Song
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  4. YuHan Hu
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  5. Hang Yin
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  7. Re Xia
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  8. YunFei Chen
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Correspondence to JianLi Wang.

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Wang, J., Song, Y., Zhang, Y. et al. Effect of radial heat conduction on effective thermal conductivity of carbon nanotube bundles. Sci. China Technol. Sci. 61, 1959–1966 (2018). https://doi.org/10.1007/s11431-018-9306-8

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  • DOI: https://doi.org/10.1007/s11431-018-9306-8

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