Journal of Porous Media

ISSN for PRINT: 1091-028X

For Online Access

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2008, Volume11

Issue 1

122 pages

DOI: 10.1615/JPorMedia.v11.i1

Issue price - $107.00

Loay B. Younis Aldabbagh
Mechanical Engineering Department , Eastern Mediterranean University, Gazi Magusa, Mersin 10, Turkey

H. F. Manesh
Department of Mechanical Engineering, Eastern Mediterranean University G. Magosa, North Cyprus, Via Mersin 10, Turkey

A. A. Mohamad
Department of Mechanical and Manufacturing Engineering, Centre for Environmental Engineering, Research and Education, Schulich School of Engineering, University of Calgary, Calgary, AB, T2N 1N4, Canada

Experiments were conducted to study transient natural convection in a porous medium filling a differentially heated enclosure. Four porous media are considered consisting of spherical beads of diameter 0.2, 0.4, 0.6, and 0.8 cm. The aspect ratio of the enclosure, A = H/L, is 0.67. The investigations were carried out for Darcy-modified Rayleigh numbers between 285 and 9 × 10⁴. The results indicate that heat transfer increases with increasing Darcy number, Da, for the same Rayleigh number. The time needed for heat wave propagation through the porous medium from the hot isothermal wall to reach a steady state is reduced with increasing Darcy number and/or by increasing the Darcy-modified Rayleigh number for the same Da. The variation of Nusselt number and the Darcy-modified Rayleigh number with time has also been investigated experimentally.

DOI: 10.1615/JPorMedia.v11.i1.50 Download article, 73-83 pages

Article price - $35.00

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