TRANSIENT NATURAL-CONVECTION IN A VERTICAL CYLINDER OPENED AT THE EXTREMITIES AND FILLED WITH A FLUID-SATURATED POROUS-MEDIUM - VALIDITY OFDARCY FLOW MODEL AND THERMAL-BOUNDARY-LAYER APPROXIMATIONS

Authors
SLIMI K BENNASRALLAH S FOHR JP
Citation
K. Slimi et al., TRANSIENT NATURAL-CONVECTION IN A VERTICAL CYLINDER OPENED AT THE EXTREMITIES AND FILLED WITH A FLUID-SATURATED POROUS-MEDIUM - VALIDITY OFDARCY FLOW MODEL AND THERMAL-BOUNDARY-LAYER APPROXIMATIONS, International journal of heat and mass transfer, 41(8-9), 1998, pp. 1113-1125
Citations number
37
Categorie Soggetti
Mechanics,"Engineering, Mechanical",Thermodynamics
Journal title
International journal of heat and mass transfer → ACNP
ISSN journal
00179310
Volume
41
Issue
8-9
Year of publication
1998
Pages
1113 - 1125
Database
ISI
SICI code
0017-9310(1998)41:8-9<1113:TNIAVC>2.0.ZU;2-3
Abstract
The purpose of the present paper is to analyse numerically the flow an d heat transfer by transient natural convection in a vertical cylinder filled with a fluid saturated porous medium. The cylinder is opened a t both ends and heated with a constant wall heat flux density. This st udy is carried out using the Forchheimer-extended Darcy flow model and a two-temperature model. The velocity, temperature and pressure drop distributions, the dimensionless flow rate q(v) and heat flux exchang ed at the cylinder exit Phi are obtained under various conditions. Th e results presented in this work provide also the validity of Darcy fl ow model and thermal boundary layer approximations. (C) 1997 Elsevier Science Ltd.