Numerical investigation of effective parameters in convective heat transfer of nanofluids flowing under a laminar flow regime
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Ebrahimnia-Bajestan E., Niazmand H., Duangthongsuk W., Wongwises S.
Publisher: Elsevier
Publication year: 2011
Journal: International Journal of Heat and Mass Transfer (0017-9310)
Volume number: 54
Issue number: 19-20
Start page: 4376
End page: 4388
Number of pages: 13
ISSN: 0017-9310
eISSN: 1879-2189
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
This article presents a numerical investigation on heat transfer performance and pressure drop of nanofluids flows through a straight circular pipe in a laminar flow regime and constant heat flux boundary condition. Al 2O3, CuO, carbon nanotube (CNT) and titanate nanotube (TNT) nanoparticles dispersed in water and ethylene glycol/water with particle concentrations ranging between 0 and 6 vol.% were used as working fluids for simulating the heat transfer and flow behaviours of nanofluids. The proposed model has been validated with the available experimental data and correlations. The effects of particle concentrations, particle diameter, particles Brownian motions, Reynolds number, type of the nanoparticles and base fluid on the heat transfer coefficient and pressure drop of nanofluids were determined and discussed in details. The results indicated that the particle volume concentration, Brownian motion and aspect ratio of nanoparticles similar to flow Reynolds number increase the heat transfer coefficient, while the nanoparticle diameter has an opposite effect on the heat transfer coefficient. Finally, the present study provides some considerations for the appropriate choice of the nanofluids for practical applications. ฉ 2011 Elsevier Ltd. All rights reserved.
Keywords
Numerical study
Contact Information