Nanofluids Containing γ-Fe2O3 Nanoparticles and Their Heat Transfer Enhancements
Open Access
- 20 May 2010
- journal article
- research article
- Published by Springer Nature in Discover Nano
- Vol. 5 (7) , 1222-1227
Abstract
Homogeneous and stable magnetic nanofluids containing γ-Fe2O3 nanoparticles were prepared using a two-step method, and their thermal transport properties were investigated. Thermal conductivities of the nanofluids were measured to be higher than that of base fluid, and the enhanced values increase with the volume fraction of the nanoparticles. Viscosity measurements showed that the nanofluids demonstrated Newtonian behavior and the viscosity of the nanofluids depended strongly on the tested temperatures and the nanoparticles loadings. Convective heat transfer coefficients tested in a laminar flow showed that the coefficients increased with the augment of Reynolds number and the volume fraction.Keywords
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