Some properties of convective oscillations in porous medium

Hicham Khallouf (1) , Grigori Z. Gershuni (2) , Abdelkader Mojtabi (1)

1 IMFT - Institut de mécanique des fluides de Toulouse
2 Perm State University

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.

Mots clés: Convective oscillations; Darcy-Boussinesq model; Porous media

Domaines: Mécanique des fluides [physics.class-ph]

Hicham Khallouf, Grigori Z. Gershuni, Abdelkader Mojtabi. Some properties of convective oscillations in porous medium. Numerical Heat Transfer, Part A Applications, 1996, 30 (6), pp.605-618. ⟨10.1080/10407789608913860⟩. ⟨hal-01946083⟩