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Journal of Porous Media
Fator do impacto: 1.49 FI de cinco anos: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v4.i2.90
1 pages

Transient Natural Convection in Differentially Heated Porous Enclosures: Corrected Abstract

A. A. Merrikh
Department of Mechanical Engineering, Eastern Mediterranean University, G. Magosa, T.R.N.C. Mersin 10, Turkey

RESUMO

The following abstract should replace the one that appeared with this article in the Journal of Porous Media, 3(2), 165 (2000).
Transient natural convective flow and heal transfer in a differentially heated enclosure filled with a saturated porous medium is investigated numerically by adopting the general flow model that accounts for both the boundary and the inertial effects in porous media. The present study covers investigation of the fluid Rayleigh number (RA) between 1 × 105 and 1 × 109, the Darcy number (DA) of 1 × 10−6 to 1 × 10−2 for aspect ratio, and the inertial parameter and modified Prandtl number of unity. For DA > 1 × 10−6, it is found that if the modified Rayleigh number (RamRa.Da) is greater than 100, significant differences exist between the general model and the Darcy model predictions, especially at the early transient stage. Both in the Darcy and non-Darcy regimes, the Brinkman extended model agreed well with the general model. Also, it is found that Forchheimer's term is significant in the transient stage, but it is of no importance at the steady state.


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