中国物理B ›› 2007, Vol. 16 ›› Issue (7): 2028-2032.doi: 10.1088/1009-1963/16/7/037

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Effect of multipolar interaction on the effective thermal conductivity of nanofluids

高雷1, 周晓锋2   

  1. (1)Department of Physics, Suzhou University, Suzhou 215006, China; (2)Yancheng Institute of Technology, Yancheng 224003, China
  • 收稿日期:2006-07-06 修回日期:2006-08-21 出版日期:2007-07-20 发布日期:2007-07-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~10204017) and the Natural Science of Jiangsu Province, China (Grant No~BK2002038).

Effect of multipolar interaction on the effective thermal conductivity of nanofluids

Zhou Xiao-Feng(周晓锋)a) and Gao Lei(高雷)b)   

  1. a Yancheng Institute of Technology, Yancheng 224003, China; b Department of Physics, Suzhou University, Suzhou 215006, China
  • Received:2006-07-06 Revised:2006-08-21 Online:2007-07-20 Published:2007-07-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~10204017) and the Natural Science of Jiangsu Province, China (Grant No~BK2002038).

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摘要： Nanofluids or liquids with suspended nanoparticles are likely to be the future heat transfer media, as they exhibit higher thermal conductivity than those of liquids. It has been proposed that nanoparticles are apt to congregate and form clusters, and hence the interaction between nanoparticles becomes important. In this paper, by taking into account the interaction between nearest-neighbour inclusions, we adopt the multiple image method to investigate the effective thermal conductivity of nanofluids. Numerical results show that then the thermal conductivity ratio between the nanoparticles and fluids is large, and the two nanoparticles are close up and even touch, and the point-dipole theory such as Maxwell--Garnett theory becomes rough as many-body interactions are neglected. Our theoretical results on the effective thermal conductivity of CuO/water and Al$_{2}$O$_{3}$/water nanofluids are in good agreement with experimental data.

关键词: nanofluids, thermal conductivity, multipolar interaction

Abstract: Nanofluids or liquids with suspended nanoparticles are likely to be the future heat transfer media, as they exhibit higher thermal conductivity than those of liquids. It has been proposed that nanoparticles are apt to congregate and form clusters, and hence the interaction between nanoparticles becomes important. In this paper, by taking into account the interaction between nearest-neighbour inclusions, we adopt the multiple image method to investigate the effective thermal conductivity of nanofluids. Numerical results show that then the thermal conductivity ratio between the nanoparticles and fluids is large, and the two nanoparticles are close up and even touch, and the point-dipole theory such as Maxwell--Garnett theory becomes rough as many-body interactions are neglected. Our theoretical results on the effective thermal conductivity of CuO/water and Al$_{2}$O$_{3}$/water nanofluids are in good agreement with experimental data.

Key words: nanofluids, thermal conductivity, multipolar interaction

中图分类号:  (Thermal conduction in nonmetallic liquids)

  • 66.25.+g
61.46.Df (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)) 82.70.Kj (Emulsions and suspensions)