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Annals of the Assembly for International Heat Transfer Conference 13

ISBN 1-56700-225-0 / CD 1-56700-226-9

Volumes per year:

various

Year 2006

DOI: 10.1615/IHTC13.p6

OSCILLATORY DOUBLE DIFFUSIVE CONVECTION IN A VERTICAL BRIDGMAN CAVITY

E. A. Semma
LM laboratory, University Hassan I, Faculté des Sciences et Techniques de Settat, B.P. 577, Settat, Morocco

K. Achoubir
Ecole Mohammadia d'Ingénieurs, Université Mohammed V, Agdal, Rabat, Maroc

M. Bouzi
Faculté des Sciences et Techniques de Settat, B.P. 577, Settat, Maroc

A. Cheddadi
Faculté des Sciences et Techniques de Settat, B.P. 577, Settat, Maroc

Rachid Bennacer
LEEVAM, Université de Cergy-Pontoise, 5, Mail Gay Lussac, Neuville sur Oise, 95031 Cergy-Pontoise Cedex; and LEEE (Paris X), 1 Chemin Desvalliere, 92410 Ville d'Avray, France

Mohammed El Ganaoui
SPCTS, CNRS U. M.R. 6638. Université de Limoges, 123 Av. Albert Thomas, 87060 Limoges, France

ABSTRACT

Two dimensional study of the double-diffusive convection in a cavity heated from below is simulated using a finite volume method. The results showed the presence of various solutions in response to simultaneous vertical temperature and species concentration gradients applied to the system. Sherwood number is very sensitive to the dynamic field. However, the heat transfer rate is slightly affected because of the low Prandt number. The bifurcation diagram shows the presence of various solutions and the appearance of weak frequency oscillatory modes from a critical thermal Rayleigh number. This threshold of steady/oscillatory transition is correlated according to the Lewis number.