Journal
PHYSICS LETTERS A
Volume 377, Issue 19-20, Pages 1358-1361Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2013.03.040
Keywords
Carbon nanotube; Graphene; Molecular alignment; Molecular dynamics simulation; Paraffins; Thermal conductivity
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Funding
- US Department of Energy [DE-SC0002470]
- Alabama EPSCoR Program under the Graduate Research Scholars Program
- Samuel Ginn College of Engineering
- Department of Mechanical Engineering at Auburn University
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Molecular dynamics simulations have been utilized to study thermal conductivity of liquid and solid mixtures of paraffin and carbon-based high aspect-ratio nano-additives, i.e. carbon nanotubes and graphene. In agreement with existing experimental data, we observe high enhancement in thermal conductivity through adding these graphitic nano-additives into paraffin, particularly in the solid phase. We demonstrate that this significant improvement is mainly achieved by the enhancement in thermal conductivity of the matrix itself. This is caused by carbon nanotubes and graphene promoting ordering of the matrix molecules which consequently leads to improvement of its thermal conductivity. (C) 2013 Elsevier B.V. All rights reserved.
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