Turbulent Properties of Stationary Flows in Porous Media
Résumé
In this study, we investigate the flow dynamics in a fixed bed of hydrogel beads using particle tracking
velocimetry to compute the velocity field in the middle of the bed for moderate Reynolds numbers
(Re = 124, 169, 203, 211). We discover that even though the flow is stationary at the larger scales, it
exhibits complex multiscale spatial dynamics reminiscent of those observed in classical turbulence. We
find evidence of the presence of an inertial range and a direct energy cascade, and are able to obtain a value
for a “porous” Kolmogorov constant of C2 = 3.1 + ou - 0.3. This analogy with turbulence opens up new
possibilities for understanding mixing and global transport properties in porous media.
Domaines
Génie des procédés
Fichier principal
Turbulent_properties.pdf (1.28 Mo)
Télécharger le fichier
SupplementalMaterial_Turbulent_properties_of.pdf (1.33 Mo)
Télécharger le fichier