Magnetic Field Effect on Natural Convection in a Nanofluid filled Enclosure with Non-Uniform Heating on Both Side Walls

Magnetic Field Effect on Natural Convection in a Nanofluid filled Enclosure with Non-Uniform Heating on Both Side Walls

I. Mejri* A. Mahmoudi M.A. Abbassi A. Omri 

UR:Unité de Recherche Matériaux, Energie et Energies Renouvelables (MEER), Faculté des Sciences de Gafsa, Zarroug, Gafsa 2112, Tunisia

Corresponding Author Email: 
im.mejri85@yahoo.fr
Page: 
127-133
|
DOI: 
https://doi.org/10.18280/ijht.320118
| |
Published: 
31 December 2014
| Citation

OPEN ACCESS

Abstract: 

This paper examines the natural convection in a square enclosure filled with a water-Al2O3 nanofluid and is subjected to a magnetic field. The side walls of the cavity have spatially varying sinusoidal temperature distributions. The horizontal walls are adiabatic. Lattice Boltzmann method (LBM) is applied to solve the coupled equations of flow and temperature fields. This study has been carried out for the pertinent parameters in the following ranges: Rayleigh number of the base fluid, Ra=103 to 105, Hartmann number varied from Ha=0 to 90, phase deviation (γ=0, π/4, π/2, 3π/4 and π) and the solid volume fraction of the nanoparticles between φ = 0 and 6%. The results show that the heat transfer rate increases with an increase of the Rayleigh number but it decreases with an increase of the Hartmann number. Also it is observed that the Phase deviation control the heat transfer rate.

1. Introduction
2. Mathematical Formulation
3. Results and Discussion
4. Conclusions
Nomenclature
  References

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