Coriolis effects on Filtration law in rotating porous medi

Jean-Louis Auriault (1) , Christian Geindreau (1) , Pascale Royer (1)

1 3SR - Laboratoire sols, solides, structures - risques [Grenoble]

We investigate the filtration law of incompressible viscous Newtonian fluids in rigid non-inertial porous media, for example, rotating porous media. The filtration law is obtained by upscaling the flow at the pore scale. We use the method of multiple scale expansions which gives rigorously the macroscopic behaviour without any prerequisite on the form of the macroscopic equations. For finite Ekman numbers the filtration law is shown to resemble a Darcy's law, but with a non-symmetric permeability tensor which depends on the angular velocity of the porous matrix. We obtain the filtration analog of the Hall effect. For large Ekman numbers the filtration law is a small correction to the classical Darcy's law. The corrector is antisymmetric. In this case we recover a structure of law which is similar to phenomenological laws introduced in the literature, but with a dissimilar effective coefficient.

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

Jean-Louis Auriault, Christian Geindreau, Pascale Royer. Coriolis effects on Filtration law in rotating porous medi. Transport in Porous Media, 2002, 48 (3), pp.315-330. ⟨10.1023/A:1015720529464⟩. ⟨hal-01934062⟩