Thermal conductivity enhancement of ZnO nanofluid using a one-step physical method

被引：96

作者：

Lee, Gyoung-Ja ^{[1
]}

Kim, Chang Kyu ^{[1
,2
]}

Lee, Min Ku ^{[1
]}

Rhee, Chang Kyu ^{[1
]}

Kim, Seokwon ^{[3
]}

Kim, Chongyoup ^{[3
]}

机构：

[1] Korea Atom Energy Res Inst, Nucl Mat Res Div, Taejon 305353, South Korea

[2] Univ Sci & Technol, Taejon 305350, South Korea

[3] Korea Univ, Dept Chem & Biol Engn, Seoul 136713, South Korea

来源：

THERMOCHIMICA ACTA | 2012年 / 542卷

关键词：

Nanofluid; ZnO; Pulsed wire evaporation; Thermal conductivity; Viscosity; WIRE EVAPORATION METHOD; PARTICLE-SIZE; HEAT-TRANSFER; NANOPARTICLES; OXIDE;

D O I：

10.1016/j.tca.2012.01.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the present work, an ethylene-glycol (EG) based nanofluid containing ZnO nanoparticles was prepared by a one-step physical method known as pulsed-wire evaporation (PWE). The structural properties of the ZnO nanoparticles were studied by X-ray diffraction method and high-resolution transmission electron microscopy. The thermal conductivity of the EG-based ZnO nanofluid at a higher concentration exhibited temperature-dependency due to the clustering and aggregation of nanoparticles in the fluid. Moreover, the experimentally measured value of the thermal conductivity was higher than the theoretically calculated value based on the Hamilton-Crosser model. From an analysis of the theological behavior, it was found that all of the nanofluids showed Newtonian behavior. The viscosity increment did not show temperature-dependency, and its value increased with the ZnO volume fraction at a fixed temperature. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：24 / 27

页数：4

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