The thermal conductivity of water base ferrofluids under magnetic field

被引：165
作者：
Gavili, Anwar [1 ]
Zabihi, Fatemeh [1 ]
Isfahani, Taghi Dallali [1 ]
Sabbaghzadeh, Jamshid [1 ]
机构：
[1] Natl Ctr Laser Sci & Technol, Tehran, Iran
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2012年 / 41卷
关键词：
Ferrofluid; Thermal conductivity; Magnetic field; Helmholtz coils; Magnetic nanoparticles; HEAT-TRANSFER; NANOFLUIDS; NANOPARTICLES;
D O I：
10.1016/j.expthermflusci.2012.03.016
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this manuscript, the thermal conductivity of ferrofluid's containing Fe3O4 nanoparticles suspended in de-ionized water under magnetic field was experimentally investigated. Magnetic field was created by Helmholtz coils while its intensity was controlled by the electric current. The saturation time and the reversibility of thermal conductivity were also examined after the magnetic field was turned off. Furthermore the variation of thermal conductivity with temperature was shown. According to our results a ferrofluid with 5.0% volume fraction of nanoparticles with an average diameter of 10 nm enhanced the thermal conductivity more than 200% at maximum value. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：94 / 98
页数：5
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