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| Titre: | Numerical simulation of natural convection between two concentric isothermal spheres at moderate Rayleigh number |
| Auteur(s): | Baghli, Houda
Cheddadi, Abdelkhalek |
| Mots-clés: | Natural Convection
Numerical
Rayleigh Number
Simulation
Spherical annuli |
| Date de publication: | 2019 |
| Editeur: | American Institute of Physics |
| Collection/Numéro: | AIP Conference Proceedings/ Vol.2190, N°1 (2019); |
| Résumé: | The numerical Simulation of natural convection within an incompressible Newtonian fluid confined between two isothermal and concentric spheres is carried out. The phenomenon considered is two-dimensional, axisymmetric and permanent, with an annular space ratio of A = 2, filled with air Pr = 0.7, at moderate Rayleigh number Ra between 103 and 106. Simultaneous resolution of the continuity equations, of Navier-Stokes and energy, is carried out by the combination of the implicit method of alternate directions (ADI) with the method of convergence acceleration by successive replacement (SAR), in the Vorticity-Stream function formulation. The isovalues of temperature T and the steam function ψ obtained, as well as the Average Nusselt number, are in a good agreement with previous studies, and gives new Nusselt number correlation Nu = f(Ra) |
| URI/URL: | https://aip.scitation.org/doi/10.1063/1.5138560
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/6592 |
| ISSN: | 0094-243X |
| Collection(s) : | Communications Internationales
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