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Open Access Nano Express

Heat transfer augmentation in nanofluids via nanofins

Peter Vadasz

Author affiliations

Department of Mechanical Engineering, Northern Arizona University, P. O. Box 15600, Flagstaff, AZ 86011-5600, USA

Faculty of Engineering, University of KZ Natal, Durban 4041, South Africa

Citation and License

Nanoscale Research Letters 2011, 6:154  doi:10.1186/1556-276X-6-154

Published: 18 February 2011

Abstract

Theoretical results derived in this article are combined with experimental data to conclude that, while there is no improvement in the effective thermal conductivity of nanofluids beyond the Maxwell's effective medium theory (J.C. Maxwell, Treatise on Electricity and Magnetism, 1891), there is substantial heat transfer augmentation via nanofins. The latter are formed as attachments on the hot wire surface by yet an unknown mechanism, which could be related to electrophoresis, but there is no conclusive evidence yet to prove this proposed mechanism.