Abstract
The goal of the present paper is to investigate experimentally and theoretically the capillary driven filtration in porous media with homogeneous and inhomogeneous porosity and permeability under microgravity conditions. The motivation having determined the choice of the environment was to study nonequilibrium phenomena in two-phase filtration in porous media. The paper contains the results illustrating the sensitivity of capillary forces to variations of porous media characteristics. The experimental results obtained for fluid imbibition into unsaturated artificial and natural porous media are compared. Theoretical and experimental results on determination of mixing fluxes in two-phase filtration are discussed.
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