A new study of laminar natural convection in two concentric vertical cylinders

Authors
Hadjadj, A Maamir, S Zeghmati, B
Citation
A. Hadjadj et al., A new study of laminar natural convection in two concentric vertical cylinders, HEAT MASS T, 35(2), 1999, pp. 113-121
Citations number
24
Categorie Soggetti
Mechanical Engineering
Journal title
HEAT AND MASS TRANSFER
ISSN journal
09477411 → ACNP
Volume
35
Issue
2
Year of publication
1999
Pages
113 - 121
Database
ISI
SICI code
0947-7411(199907)35:2<113:ANSOLN>2.0.ZU;2-Y
Abstract
The authors present a numerical investigation of laminar natural convection in two concentric vertical cylinders. The two-dimensional governing equati ons have been solved using a control volume finite difference method. The c oupling between the continuity and momentum equations is effected using the SIMPLE algorithm. Solutions have been obtained for Prandtl numbers of 0.01 to 10, Rayleigh numbers of 1 to 10(5) and cylinder aspect ratios of 0.5 to 10. The effects of the changes in these parameters on the variation of the temperature and flow patterns within the cylinder have been studied. The l ocal and average Nusselt numbers correlations of interest in determining th e insulating value of an annular cavity formed by two concentric vertical c ylinders have been obtained.