Euler‐Lagrangian Simulation of Magnetic Field Effects on the Mixed Convection of Ferrofluid

Abstract

In this article, the hydro‐thermal behavior of a ferrofluid flow (kerosene and 4 vol% Fe3O4) in a vertical tube in the presence of different magnetic field gradients using a two‐phase Euler–Lagrange model and control volume technique has been reported. Two cases for the magnetic field gradients have been considered to affect the mixed convection of the ferrofluid: non‐uniform axial negative and positive field gradients. Unlike our previous studies instead of uniform nanoparticle distribution within the flow, it has been considered as non‐uniform (maximum concentration profile is at the flow centerline). Based on the obtained results in this case, the velocity profiles in the negative magnetic field gradients are more affected than our previous studies. Also the time variations of the Nusselt number and skin friction factor have been presented. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res 43(2): 148‐166, 2014; Published online 12 September 2013 in Wiley Online Library (http://wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21069

Numerical Investigation of the Magnetic Field Effects on the Entropy Generation and Heat Transfer in a Nanofluid Filled Cavity with Natural Convection

“…His results showed that the effects of a magnetic field are considerable and it can shift the reattachment of the flow in the downstream direction. Recently Aminfar and colleagues [13][14][15][16][17][18][19] and Mohammadpourfard [20] investigated the effects of different nonuniform magnetic fields on the hydrodynamic and thermal behavior of a ferrofluid. They showed the effects of applying a magnetic field on the Nusselt number and the friction.…”