Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 115, Issue -, Pages 915-925Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2017.07.117
Keywords
Nanofluids; Turbulent heat transfer; Forced convection; Thermal conductivity; Viscosity; Pressure drop; Nanoparticle size; Channels with wall heat transfer enhancers
Categories
Funding
- Government of Russia [14.Z50.31.0003]
- Ministry of Education and Science of the Russian Federation Government
- Siberian Federal University [16.8368.2017]
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Experimental study of forced turbulent convection of water-based nanofluids with nanoparticles of zirconium oxide (ZrO2) was carried out in smooth tubes and channels with wall heat transfer enhancers. Nanopowders with average particle size of 44 and 105 nm were used in the experiments. The Reynolds number ranged from 3000 to 8000. It is revealed that the increments in the heat transfer coefficient and the pressure drop when using nanofluids depend on the surface shape of the channel. It is shown that nanofluids allow reaching thermal-hydraulic efficiency comparable to that of the channels with artificial heat transfer enhancers. (C) 2017 Elsevier Ltd. All rights reserved.
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