Effective thermal conductivity and rheological characteristics of ethylene glycol-based nanofluids with single-walled carbon nanohorn inclusions

被引：32

作者：

Selvam, C. ^{[1
]}

Harish, Sivasankaran ^{[2
]}

Lal, D. Mohan ^{[1
]}

机构：

[1] Anna Univ, Dept Mech Engn, Refrigerat & Air Conditioning Div, Madras 600025, Tamil Nadu, India

[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka, Japan

来源：

FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2017年 / 25卷 / 02期

关键词：

nanofluids; thermal conductivity; rheology; carbon nanohorn; non-Newtonian; ELECTRICAL-CONDUCTIVITY; PHYSICAL-PROPERTIES; DYNAMIC VISCOSITY; BEHAVIOR; ENHANCEMENT; TEMPERATURE; STABILITY; FLOW;

D O I：

10.1080/1536383X.2016.1261285

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, we report the effective thermal conductivity and rheological behavior of ethylene glycol with single-walled carbon nanohorn inclusions. The thermal conductivity and viscosity was found to increase with respect to nanohorn loading. Maximum thermal conductivity enhancement of similar to 11% at a nanohorn loading of 1.5 vol% was obtained in this study. The viscosity of nanofluids increase with respect to nanohorn loading and decreases with respect to shear rate which indicates the non-Newtonian shear thinning behavior at higher nanohorn loading. Finally, the effectiveness of nanofluids was calculated for laminar and turbulent regions to predict the heat transfer performance and favorability of these nanofluids. The present nanofluids are favorable upto 0.1 vol% in the laminar region. However, these nanofluids are not favorable for turbulent region and loadings beyond 0.1 vol% due to higher viscosity enhancement.

引用

页码：86 / 93

页数：8

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