Particle aspect-ratio effects on the thermal conductivity of micro- and nanoparticle suspensions

被引：42

作者：

Cherkasova, Anna S. ^{[1
]}

Shan, Jerry W. ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Mech & Aerosp Engn, Piscataway, NJ 08854 USA

来源：

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 2008年 / 130卷 / 08期

关键词：

thermal conductivity; suspension; aspect ratio; silicon carbide; effective medium theory;

D O I：

10.1115/1.2928050

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The influence of particle anisotropy on the effective thermal conductivity of a suspension is experimentally investigated. Suspensions of micron-sized, silicon-carbide particles with varying aspect-ratio distributions were prepared and measured. It is shown that the conductivity of the silicon-carbide suspensions can be quantitatively predicted by the effective medium theory of Nan (1997, "Effective Thermal Conductivity of Particulate Composites With Interfacial Thermal Resistance," J. Appl. Phys. 81(10), pp. 6692-6699), provided the volume-weighted aspect ratio of the particles is used. Recent experimental data on multiwalled-nanotube-in-oil suspensions by Yang (2006, "Thermal and Rheological Properties of Carbon Nanotube-in-Oil Dispersions," J. Appl. Phys., 99(11), 114307) are also analyzed and shown to be in at least qualitative agreement with the effective-medium-theory prediction that the thermal conductivity of suspensions is enhanced by large aspect-ratio particles.

引用

页数：7

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