NDLI: Numerical Study of Thermal Conductivities of Carbon-Based Mesoporous Composites

Content Provider	Springer Nature Link
Author	Feng, Daili Feng, Yanhui Zhang, Xinxin
Copyright Year	2014
Abstract	The thermal conductivities of ordered mesoporous carbon CMK-3 filled with Al nanoclusters were studied in this article. CMK-3 is a typical example of carbon rods which are arranged in a relatively regular two-dimensional hexagonal array. The initial structure of CMK-3 was generated from the amorphous carbon and validated by XRD simulation which is coincident with experimental data. The thermal conductivities of carbon rods in CMK-3 and Al nanoclusters with 133 atoms were simulated by an equilibrium molecular dynamics method. Then, the effective thermal conductivity (ETC) of a mesoporous composite, CMK-3 filled with $$\text {Al}_{133}$$ , was obtained via one-dimensional heat conduction analysis. The influences of the substrate porosity, nanocluster filling ratio, and temperature were discussed. As an anisotropic material, ETCs along the $$X$$ and $$Y$$ directions are extremely poor, due to the overwhelming effect of the air thermal resistance. However, in the $$Z$$ direction, the ETC improves almost linearly as the porosity decreases, and the value is much higher than those of $$X$$ and $$Y$$ directions. In the case of a 70 % filling ratio, when the porosity is below 59.7 %, the ETC in the $$Z$$ direction exceeds the thermal conductivity of Al nanoclusters and approaches a peak value around the melting temperature of $$\text {Al}_{133}$$ nanoclusters. The results indicate that the carbon-based mesoporous CMK-3 filled with Al nanoclusters might become a promising phase change material.
Starting Page	1863
Ending Page	1878
Page Count	16
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	35
Issue Number	9-10
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2014-04-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbon mesoporous Carbon rods Effective thermal conductivity Molecular dynamics Nanoclusters Condensed Matter Physics Mechanics Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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