DOUBLE DIFFUSIVE FREE CONVECTION IN A PACKED BED SQUARE ENCLOSURE BY USING LOCAL THERMAL NON-EQUILIBRIUM (LTNE) MODEL
Main Article Content
Abstract
In the present study, free convection heat and mass transfer of fluid in a square packed bed enclosure is numerically investigated. For the considered geometrical shape, the left vertical wall of enclosure was assumed to be kept at high temperature and concentration while the opposite wall was kept at low temperature and concentration with insulating both the top and bottom walls of enclosure. The Brinkman– Forchheimer extended Darcy model was used to solve the momentum equations, while the energy equations for fluid and solid phases were solved by using the local thermal non-equilibrium (LTNE) model.Computations are performed for a range of the Darcy number from 10-5 to 10-1, the porosity from 0.5 to 0.9, and buoyancy ratio from -15 to 15. The results showed that both the buoyancy ratio and the packed bed characteristics have significant effect on each one of the flow field, heat transfer and mass transfer.
Article Details
Section
How to Cite
References
A. Amiri and K. Vafai, Transient analysis of incompressible flow through a packed bed, International Journal of Heat and Mass Transfer, 41, 4259-4279, 1998.
A. K. Bukhari, Double diffusive convection in a horizontal porous layer superposed by a fluid layer, Umm Al-Qura Univ. J. Sci. Med. Eng. Vol. 15, No. 2, pp. 95-113, 2003.
I. Hajri*, A. Omri and S. Ben Nasrallah, A numerical model for the simulation of doublediffusive natural convection in a triangular cavity using equal order and control volume based on the finite elements method, Desalination 206, 579- 588, 2007.
K. Khanafer and K. Vafai, Doublediffusive mixed convection in a lid-driven enclosure filled with a fluid saturated porous medium, Numerical Heat Transfer, Part A, 42: 465-486, 2002.
M. Mamou, P. Vasseur and M. Hasnaoui, On numerical stability analysis of doublediffusive convection in confined enclosures, J. Fluid Mech., vol. 433, pp. 209-250, 2001.
Md. Shariful Alam, M. M. Rahman and Md.Abdul Maleque, Local similarity solutions for unsteady MHD free convection and mass transfer
flow past an impulsively started vertical porous plate with Dufour and Soret effects, Thammasat Int. J. Sc. Tech., Vol. 10, No. 3, July-Sept., 2005.
O. Rahli and K. Bouhadef *, Doublediffusive natural convection in a partially porous square enclosure; effect of the inclination, Laboratoire LTPMP, Faculté de Génie Mécanique et Génie des Procédés, USTHB, Alger – Algérie, 2004.
Q. W. Wang*, M. Zeng, Z. P. Huang, G.Wang, H. Ozoe, Numerical investigation of natural convection in an inclined enclosure filled with porous medium under magnetic field, International Journal of Heat and Mass Transfer 50, 3684-3689, 2007.
R. A. Mohamed, Double-diffusive convection-radiation interaction on unsteady MHD flow over a vertical moving porous plate with heat generation and soret effects, Applied Mathematical Sciences, Vol. 3, no. 13, 629 - 651, 2009.
R. C. Chaudhary and Arpita Jain,Combined heat and mass transfer effects on MHD free convection flow past an oscillating plate embedded in porous medium, Rom. Journ. Phys.,Vol. 52, Nos. 5–7, P. 505–524, Bucharest, 2007.
S.C. Saha, M.A. Hossain, Natural convection flow with combined buoyancy effects due to thermal and mass diffusion in a thermally stratified media, Nonlinear Analysis: Modelling and Control, Vol. 9, No. 1, 89–102, 2004.
Versteeg H. K. and Malalasekera W., An introduction to computational fluid dynamics the finite volumes method, Longman Group Ltd, 1995.
Y. Masuda, M. Yonaya, T. Ikeshoji, S.Kimura, F. Alavyoon, T. Tsukada, M. Hozawa,Oscillatory double-diffusive convection in a porous enclosure due to opposing heat and mass fluxes on the vertical walls, International Journal of Heat and Mass Transfer 45, 1365-1369, 2002.
Yoshio Masuda, Michio Yoneya, Akira Suzuki, Shigeo Kimura and Farid Alavyoon, Numerical analysis of double-diffusive convection in a porous enclosure due to opposing heat and mass fluxes on the vertical walls -Why does peculiar oscillation occur?-, Research Center for Compact chemical Process, National Institute of Advanced Industrial Science and Technology, 4-2-1 Nigatake, Miyagino-ku, Sendai 983-8551, Japan, 2008.