Mémoires de Fin d’Etudes
Etablissement
Université Mohamed Boudiaf des Sciences et de la Technologie - Mohamed Boudiaf d’Oran
Affiliation
Département de Génie Maritime
Auteur
SABEUR-BENDHINA, Amina
Directeur de thèse
Imine Omar (Professeur)
Co-directeur
Adjlout Houari (Professeur)
Filière
Energétique
Diplôme
Doctorat
Titre
Etude de la converction naturelle dans les cavites
Mots clés
Cavite. Energie. Maillage. ondes
Résumé
In the present work, the influence of non uniform boundary conditions on natural conversion in inclined rectangular carvities differentially heated is studies. The hot wall is wavy with three undulations. The ratio of the cavities has also been changed. Various inclination angles were performed. The flow and the heat transfer are calculated by solving both Navier-Stokes and the energy equations with finite volumes method for the primitive formulation and with the ADI scheme for the vorticity-stream formulation. Two distribution of temperature were imposed at the vertical walls namely linear and sinusoidal and were compared with isothermal boudary conditions. The flow and the heat transfer are also simulated for different wavelength of the sinusoidal distribution. It was found that this parameter have an effect on the trend of the local Nusselt number. The results obtained show that the trend of the local Nusselt number is wavy for all inclination angles and for all the configurations tested. The mean Nusselt number decreases comparing with the Nusselt number of the square cavity. Non uniform boundary conditions of the temperature distribution in both vertical walls increase the local and the mean Nusselt number comparing with the isotherm walls. The sinusoidal distribution seems to reduce the heat transfer rate for two wavelenghts and increasing aspect ratio results in a decrease of the Nusselt number.
Date de soutenance
01 mars 2006
Cote
02-16-0000023
Pagination
118 pages
Illusatration
graphes
Format
21/31
Statut
Soutenue