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Materials 2016, 9(7), 576; doi:10.3390/ma9070576

Numerical Study of Laminar Flow and Convective Heat Transfer Utilizing Nanofluids in Equilateral Triangular Ducts with Constant Heat Flux

Department of Mechanical Engineering, Kun Shan University, Tainan 71070, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Teen-Hang Meen
Received: 31 May 2016 / Revised: 6 July 2016 / Accepted: 8 July 2016 / Published: 15 July 2016
(This article belongs to the Special Issue Selected Papers from ICASI 2016)
View Full-Text   |   Download PDF [7233 KB, uploaded 15 July 2016]   |  

Abstract

This study numerically investigates heat transfer augmentation using water-based Al2O3 and CuO nanofluids flowing in a triangular cross-sectional duct under constant heat flux in laminar flow conditions. The Al2O3/water nanofluids with different volume fractions (0.1%, 0.5%, 1%, 1.5%, and 2%) and CuO/water nanofluids with various volume fractions (0.05%, 0.16%, 0.36%, 0.5%, and 0.8%) are employed, and Reynolds numbers in the range of 700 to 1900 in a laminar flow are considered. The heat transfer rate becomes more remarkable when employing nanofluids. As compared with pure water, at a Peclet number of 7000, a 35% enhancement in the convective heat transfer coefficient, is obtained for an Al2O3/water nanofluid with 2% particle volume fraction; at the same Peclet number, a 41% enhancement in the convective heat transfer coefficient is achieved for a CuO/water nanofluid with 0.8% particle volume concentration. Heat transfer enhancement increases with increases in particle volume concentration and Peclet number. Moreover, the numerical results are found to be in good agreement with published experimental data. View Full-Text
Keywords: nanofluids; heat transfer enhancement; Nusselt number; Peclet number nanofluids; heat transfer enhancement; Nusselt number; Peclet number
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ting, H.-H.; Hou, S.-S. Numerical Study of Laminar Flow and Convective Heat Transfer Utilizing Nanofluids in Equilateral Triangular Ducts with Constant Heat Flux. Materials 2016, 9, 576.

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