Title : ( Variable magnetic field (VMF) effect on the heat transfer of a half-annulus cavity filled by Fe3O4-water nanofluid under constant heat flux )
Authors: Mohammad Hatami , J. Zhou , J. Geng , D. Jing ,
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Abstract
In this paper, the effect of a variable magnetic field (VMF) on the natural convection heat transfer of Fe 3 O 4 -water nanofluid in a half-annulus cavity is studied by finite element method using FlexPDE com- mercial code. After deriving the governing equations and solving the problem by defined boundary con- ditions, the effects of three main parameters (Hartmann Number (Ha), nanoparticles volume fraction (u) and Rayleigh number (Ra)) on the local and average Nusselt numbers of inner wall are investigated. As a main outcome, results confirm that in low Eckert numbers, increasing the Hartmann number make a decrease on the Nusselt number due to Lorentz force resulting from the presence of stronger magnetic field.
Keywords
, Variable magnetic field (VMF) Half, annulus cavity Nanofluid Hartmann Nusselt
@article{paperid:1084796,
author = {Hatami, Mohammad and J. Zhou and J. Geng and D. Jing},
title = {Variable magnetic field (VMF) effect on the heat transfer of a half-annulus cavity filled by Fe3O4-water nanofluid under constant heat flux},
journal = {Journal of Magnetism and Magnetic Materials},
year = {2018},
volume = {451},
number = {451},
month = {April},
issn = {0304-8853},
pages = {173--182},
numpages = {9},
keywords = {Variable magnetic field (VMF)
Half-annulus cavity
Nanofluid
Hartmann
Nusselt},
}
%0 Journal Article
%T Variable magnetic field (VMF) effect on the heat transfer of a half-annulus cavity filled by Fe3O4-water nanofluid under constant heat flux
%A Hatami, Mohammad
%A J. Zhou
%A J. Geng
%A D. Jing
%J Journal of Magnetism and Magnetic Materials
%@ 0304-8853
%D 2018
