Experimental Investigation of Thermal Conductivity of magnetic nanofluids

被引：28
|
作者：
Parekh, Kinnari [1 ,2 ]
Lee, H. S. [1 ,2 ]
机构：
[1] Charotar Univ Sci & Technol, Dr KC Patel R&D Ctr, Changa 388421, Dist Anand, India
[2] KIGAM, Anand Min Resources Res Div, Daejeon 305350, South Korea
来源：
SOLID STATE PHYSICS, PTS 1 AND 2 | 2012年 / 1447卷
关键词：
thermal conductivity; magnetic fluid; nanofluid;
D O I：
10.1063/1.4710041
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Two different magnetic nanofluids comprising of magnetite and Mn-Zn ferrite particles were synthesized in light hydrocarbon oil using continuous chemical process. Powder XRD and TEM image show single phase spinel structure with size of 10 nm and 6.7 nm, respectively for magnetite and Mn-Zn ferrite. Thermal conductivity of nanofluids has been studied as a function of volume fraction under transverse magnetic field. Magnetite nanofluid shows 17 % enhancements in thermal conductivity for 4.7% volume fraction while Mn-Zn ferrite shows 45 % enhancement at 10 % volume fraction. In presence of transverse magnetic field the magnetite nanofluids shows further enhancement from 17 % to 30 % while no change in thermal conductivity has been observed for Mn-Zn ferrite. These results are explained considering the dipolar coupling co-efficient which for magnetite particles favors chain structures.
引用
收藏
页码：385 / +
页数：2
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