We investigate the thermal rectification phenomena in asymmetric graphene and carbon nanotube systems using molecular dynamics (MD) simulations. The effects of various parameters, including mean temperature, temperature difference, and system size on rectification factor have been studied. In homogenous triangular graphene nanoribbons (T-GNR), the heat current is normally higher from wide to narrow end than that in the opposite direction, resulting in a positive rectification factor. The rectification factor increases further for a double layered T-GNR. It is also found that varying the parameters like mean temperature can result in reverse of the sign of thermal rectification factor. In the case of carbon nanotube (CNT)–silicon system, the heat current is higher when heat flows from CNT to silicon. The thermal rectification factor is almost independent of the diameter of CNT. In both cases, the rectification factor increases with the imposed temperature difference.
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ASME/JSME 2011 8th Thermal Engineering Joint Conference
March 13–17, 2011
Honolulu, Hawaii, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-3892-1
PROCEEDINGS PAPER
Thermal Rectification in Graphene and Carbon Nanotube Systems Using Molecular Dynamics Simulations
Ajit K. Vallabhaneni,
Ajit K. Vallabhaneni
Purdue University, West Lafayette, IN
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Jiuning Hu,
Jiuning Hu
Purdue University, West Lafayette, IN
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Yong P. Chen,
Yong P. Chen
Purdue University, West Lafayette, IN
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Xiulin Ruan
Xiulin Ruan
Purdue University, West Lafayette, IN
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Ajit K. Vallabhaneni
Purdue University, West Lafayette, IN
Jiuning Hu
Purdue University, West Lafayette, IN
Yong P. Chen
Purdue University, West Lafayette, IN
Xiulin Ruan
Purdue University, West Lafayette, IN
Paper No:
AJTEC2011-44521, T30060; 7 pages
Published Online:
March 1, 2011
Citation
Vallabhaneni, AK, Hu, J, Chen, YP, & Ruan, X. "Thermal Rectification in Graphene and Carbon Nanotube Systems Using Molecular Dynamics Simulations." Proceedings of the ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASME/JSME 2011 8th Thermal Engineering Joint Conference. Honolulu, Hawaii, USA. March 13–17, 2011. T30060. ASME. https://doi.org/10.1115/AJTEC2011-44521
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