Particle shape effect on the viscosity and thermal conductivity of ZnO nanofluids

被引：229

作者：

Jeong, Jisun ^{[1
]}

Li, Chengguo ^{[2
]}

Kwon, Younghwan ^{[2
]}

Lee, Jaekeun ^{[2
]}

Kim, Soo Hyung ^{[3
]}

Yun, Rin ^{[4
]}

机构：

[1] Def Agcy Technol & Qual, Taejon 302210, South Korea

[2] Pusan Natl Univ, Sch Mech Engn, Pusan 609735, South Korea

[3] Pusan Natl Univ, Coll Nanosci & Nanotechnol, Dept Nanomechatron Engn, Pusan 609735, South Korea

[4] Hanbat Natl Univ, Dept Mech Engn, Taejon 305719, South Korea

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2013年 / 36卷 / 08期

关键词：

ZnO nanofluids; Heat transfer; Thermal conductivity; Viscosity; Shape effect; CONVECTIVE HEAT-TRANSFER; NANOPARTICLE SHAPE; OXIDE NANOFLUIDS; SIZE; ENHANCEMENT; TEMPERATURE; AGGREGATION; SUSPENSIONS; TIO2;

D O I：

10.1016/j.ijrefrig.2013.07.024

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The viscosity and thermal conductivity of ZnO nanofluids with nanoparticle shapes of nearly rectangular and of sphere, were experimentally investigated under various volume concentrations of the nanoparticles, ranging from 0.05 to 5.0 vol.%. The viscosity of the nanofluids increased with increases in the volume concentration by up to 69%. In addition, the enhancement of the viscosity of the nearly rectangular shape nanoparticles was found to be greater by 7.7%, than that of the spherical nanoparticles. The thermal conductivity of the ZnO nanofluids increased by up to 12% and 18% at 5.0 vol.% for the spherical and the nearly rectangular shape nanoparticles, respectively, compared to that of the base fluid (water). The shape of the particles is found to have a significant effect on the viscosity and thermal conductivity enhancements. (C) 2013 Elsevier Ltd and HR. All rights reserved.

引用

页码：2233 / 2241

页数：9

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