Numerical investigation of magnetic field effect on mixed convection heat transfer of nanofluid in a channel with sinusoidal walls

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TitreNumerical investigation of magnetic field effect on mixed convection heat transfer of nanofluid in a channel with sinusoidal walls
Publication TypeJournal Article
Year of Publication2016
AuthorsRashidi MM, Nasiri M, Khezerloo M, Laraqi N
JournalJournal of Magnetism and Magnetic Materials
Volume401
Pagination159–168
Date Publishedmar
ISSN0304-8853
Mots-clésMagnetic field, Magneto-hydrodynamics (MHD), Mixed heat transfer, Nano-fluid, Sinusoidal channel
Abstract

In this study, mixed convection heat transfer of nano-fluid flow in vertical channel with sinusoidal walls under magnetic field effect is investigated numerically. The heat transfer and hydrodynamic characteristics have been examined. This study has performed for 500≤Re≤1000, 5×104≤Gr≤1×106 , three amplitude sine wave (0.1, 0.2 and 0.3) and three values of Hartman numbers (0, 5 and 10). Water was utilized as the base fluid and Al2O3 is the considered nano-particle. Flow is assumed two dimensional, laminar, steady and incompressible. As well the thermo-physical properties of nano-fluid are considered constant. The Boussinesq approximation used for calculated the density variations. The average Nusslet number increases by increasing the Grashof number for nano-fluids with different volume fraction. The average Nusselt and Poiseuille number increase as Reynolds number increases. Also, the average Nusselt number and Poiseuille number increases by increasing the Hartman number.

URLhttp://www.sciencedirect.com/science/article/pii/S0304885315306685
DOI10.1016/j.jmmm.2015.10.034