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Heat transfer enhancement in turbulent tube flow using Al2O3 nanoparticle suspension

Sidi El Bécaye Maïga (Faculty of Engineering, Université de Moncton, Moncton, Canada)
Cong Tam Nguyen (Faculty of Engineering, Université de Moncton, Moncton, Canada)
Nicolas Galanis (Department of Mechanical Engineering, Faculty of Engineering, Université de Sherbrooke, Sherbrooke, Canada)
Gilles Roy (Faculty of Engineering, Université de Moncton, Moncton, Canada)
Thierry Maré (LGCGM INSA de Rennes/IUT de Saint Malo, Saint‐Malo, France)
Mickaël Coqueux (LGCGM INSA de Rennes/IUT de Saint Malo, Saint‐Malo, France)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 1 April 2006

2263

Abstract

Purpose

To study the hydrodynamic and thermal behaviors of a turbulent flow of nanofluids, which are composed of saturated water and Al2O3 nanoparticles at various concentrations, flowing inside a tube submitted to a uniform wall heat flux boundary condition.

Design/methodology/approach

A numerical method based on the “control‐volume” approach was used to solve the system of non‐linear and coupled governing equations. The classical κε model was employed in order to model the turbulence, together with staggered non‐uniform grid system. The computer model, satisfactorily validated, was used to perform an extended parametric study covering wide ranges of the governing parameters. Information regarding the hydrodynamic and thermal behaviors of nanofluid flow are presented.

Findings

Numerical results show that the inclusion of nanoparticles into the base fluid has produced an augmentation of the heat transfer coefficient, which has been found to increase appreciably with an increase of particles volume concentration. Such beneficial effect appears to be more pronounced for flows with moderate to high Reynolds number. In reverse, the presence of nanoparticles has induced a rather drastic effect on the wall shear stress that has also been found to increase with the particle loading. A new correlation, Nufd=0.085 Re0.71 Pr0.35, is proposed to calculate the fully‐developed heat transfer coefficient for the nanofluid considered.

Practical implications

This study has provided an interesting insight into the nanofluid thermal behaviors in the context of a confined tube flow. The results found can be easily exploited for various practical heat transfer and thermal applications.

Originality/value

The present study is believed to be an interesting and original contribution to the knowledge of the nanofluid thermal behaviors.

Keywords

Citation

El Bécaye Maïga, S., Tam Nguyen, C., Galanis, N., Roy, G., Maré, T. and Coqueux, M. (2006), "Heat transfer enhancement in turbulent tube flow using Al2O3 nanoparticle suspension", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 16 No. 3, pp. 275-292. https://doi.org/10.1108/09615530610649717

Publisher

:

Emerald Group Publishing Limited

Copyright © 2006, Emerald Group Publishing Limited

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