期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 13, 期 7, 页码 2791-2798出版社
SPRINGER
DOI: 10.1007/s11051-010-0167-0
关键词
Nanofluids; Thermal conductivity; Theoretical model; Brownian motion; Maxwell's model; Colloids
资金
- Department of Science and Technology, New Delhi [SR/FTP/ETA-51/2009]
Nanofluid is an innovative heat transfer fluid with superior potential for enhancing the heat transfer performance of conventional fluids. Though many attempts have been made to investigate the abnormal high thermal conductivity of nanofluids, the existing models cannot precisely predict the same. An attempt has been made to develop a model for predicting the thermal conductivity of different types of nanofluids. The model presented here is derived based on the fact that thermal conductivity of nanofluids depends on thermal conductivity of particle and fluid as well as micro-convective heat transfer due to Brownian motion of nanoparticles. Novelty of the article lies in giving a unique equation which predicts thermal conductivity of nanofluids for different concentrations and particle sizes which also correctly predicts the trends observed in experimental data over a wide range of particle sizes, temperatures, and particle concentrations.
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