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A 2D Lattice Boltzmann Full Analysis of MHD Convective Heat Transfer in Saturated Porous Square Enclosure

Ridha Djebali1,2, Mohamed ElGanaoui3, Taoufik Naffouti1
Univ.de Tunis El Manar, Faculté des Sciences de Tunis / LETTM, 2092 Manar II, Tunis. ridha.djebali@ipein.rnu.tn
CNRS-SPCTS / CEC 12, Rue Atlantis 87068, Limoges, France.
Univ. de Lorraine, IUT Henri Poincaré / LERMAB-Longwy, 186-Rue de Lorraine, 54400 Cosnes et Romain, France

Computer Modeling in Engineering & Sciences 2012, 84(6), 499-527. https://doi.org/10.3970/cmes.2012.084.499

Abstract

A thermal lattice Boltzmann model for incompressible flow is developed and extended to investigate the natural convection flow in porous media under the effect of uniform magnetic field. The study shows that the flow behaviour is various parameters dependent. The Rayleigh number (Ra), Hartmann number (Ha), Darcy number (Da) and the medium inclination angle from the horizontal (Φ), the magnetic field orientation (ψ) and the medium porosity (ε) effects are carried out in wide ranges encountered in industrial and engineering applications. It was found that the flow and temperature patterns change significantly when varying these parameters. To confirm the accuracy in present simulations, the present results are first validated on two test cases with and without magnetic field. A good agreement is observed by comparison with available previous works. It is found also that the lattice Boltzmann method is a reliable tool that gives a great deal of valuable information about the dynamics of buoyancy-driven flows and put on view the physics of the flow under stiff conditions.

Keywords

Lattice Boltzmann computer modeling, magnetic fluid, heat transfer, porous media flow, thermal convection.

Cite This Article

Djebali, R., ElGanaoui, M., Naffouti, T. (2012). A 2D Lattice Boltzmann Full Analysis of MHD Convective Heat Transfer in Saturated Porous Square Enclosure. CMES-Computer Modeling in Engineering & Sciences, 84(6), 499–527.



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