Thermal conductivity in spherical nanocolloids

被引：5

作者：

Koushki, E. ^{[1
,2
]}

Ara, M. H. Majles ^{[1
]}

Doost, H. Akherat ^{[1
]}

机构：

[1] Kharazmi Univ, Dept Phys, Photon Lab, Tehran, Iran

[2] Hakim Sabzevari Univ, Dept Phys, Sabzevar, Iran

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2013年 / 69卷

关键词：

Thermal conductivity; Nanocolloid; Brownian motion; Statistical mechanics; Legender series; KINETIC-THEORY; MOTION; LIQUIDS; SYSTEM;

D O I：

10.1016/j.ijthermalsci.2013.03.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the present work, a proper description of Brownian motion of nanoparticles is offered and the mean velocity in a preferred direction and the mean free path of the nanoparticles are evaluated statistically. Based on this study, a proper model for thermal conductivity of nanocolloids is obtained. This modified model considers two main mechanisms that contribute in thermal conductivity; thermal carriers inside the particles and the Brownian motion of the particles. New models for both the mechanisms are proposed that have some virtues in comparison with the previous models. Evaluations show that in the thermal conductivity, the portion of Brownian motion is negligible in comparison with the other one. This model has been tested by silver nanoparticles dispersed in water. Using this model, simulation of the energy flux and the temperature distribution is offered. (C) 2013 Elsevier Masson SAS. All rights reserved.

引用

页码：14 / 20

页数：7

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