Empirical correlation finding the role of temperature and particle size for nanofluid (Al2O3) thermal conductivity enhancement

Applied Physics Letters - Tập 87 Số 15 - 2005
Chan Hee Chon1, Kenneth D. Kihm1, Shin Pyo Lee2, Stephen U. S. Choi3
1University of Tennessee Department of Mechanical, Aerospace, and Biomedical Engineering, , Knoxville, Tennessee 37996
2Kyonggi University Department of Mechanical Engineering, , Suwon, 443-760, Korea
3Argonne National Laboratory Energy Technology Division, , Argonne, Illinois 60439

Tóm tắt

In this letter, we report an experimental correlation [Eqs. (1a) and (1b) or (1c)] for the thermal conductivity of Al2O3 nanofluids as a function of nanoparticle size (ranging from 11nmto150nm nominal diameters) over a wide range of temperature (from 21to71°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.

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Tài liệu tham khảo

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Applied Physics Letters

Tập 87 Số 15

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