Empirical correlation finding the role of temperature and particle size for nanofluid (Al2O3) thermal conductivity enhancement -: art. no. 153107

被引:1099
作者
Chon, CH
Kihm, KD [1 ]
Lee, SP
Choi, SUS
机构
[1] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA
[2] Kyonggi Univ, Dept Mech Engn, Suwon 443760, South Korea
[3] Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA
关键词
D O I
10.1063/1.2093936
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter, we report an experimental correlation [Eqs. (1a d1b) or (1c)] for the thermal conductivity of Al2O3 nanofluids as a function of nanoparticle size (ranging from 11 nm to 150 nm nominal diameters) over a wide range of temperature (from 21 to 71 degrees C). Following the previously proposed conjecture from the theoretical point-of-view (Jang and Choi, 2004), it is experimentally validated that the Brownian motion of nanoparticles constitutes a key mechanism of the thermal conductivity enhancement with increasing temperature and decreasing nanoparticle sizes. (C) 2005 American Institute of Physics.
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页码:1 / 3
页数:3
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