Diffusion, aggregation, and the thermal conductivity of nanofluids

被引：69

作者：

Gharagozloo, Patricia E. ^{[1
]}

Eaton, John K. ^{[1
]}

Goodson, Kenneth E. ^{[1
]}

机构：

[1] Stanford Univ, Stanford, CA 94305 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2977868

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of nanoparticle aggregation and diffusion are difficult to separate using most nanofluid thermal conductivity data, for which the temperature dependence is collected sequentially. The present work captures the instantaneous temperature-dependent thermal conductivity using cross-sectional infrared microscopy and tracks the effects of aggregation and diffusion over time. The resulting data are strongly influenced by spatial and temperature variations in particle size and concentration and are interpreted using a Monte Carlo simulation and rate equations for particle and heat transport. These experiments improve our understanding of nanofluid behavior in practical systems including microscale heat exchangers. (c) 2008 American Institute of Physics.

引用

页数：3

共 31 条

[21] Effect of aggregation kinetics on the thermal conductivity of nanoscale colloidal solutions (nanofluid) [J].