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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 30, 1996 - Issue 6
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Original Articles

SOME PROPERTIES OF CONVECTIVE OSCILLATIONS IN POROUS MEDIUM

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Pages 605-618 | Received 09 Jan 1996, Accepted 31 May 1996, Published online: 15 Mar 2007
 

Abstract

Convective oscillations in porous media are studied numerically. A two-dimensional square, differentially heated cavity, filled with a saturated porous medium, is considered subject to linear harmonic oscillations in the vertical direction. The formulation is based on the Darcy-Boussinesq model. The problem includes three nondimensional parameters: the Rayleigh number for porous media Ra, its vibrational analog Ra, and the nondimensional frequency f. The time-dependent Darcy-Boussinesq equations have been solved using a pseudo-spectral Chebyshev collocation method. The instantaneous fields of the established oscillatory regimes are presented. Also, some instantaneous and mean characteristics are studied and discussed. The distinctions from the case of viscous fluid atone are emphasized.

Notes

Address correspondence to Professor A. Mojtabi, Laboratoire de Modelisation en Mecanique de Fluides, Institut de Mecanique des Fluides, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex, France

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