Multiple capillary-driven imbibition of a porous medium under microgravity conditions: Experimental investigation and mathematical modeling

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Multiple capillary-driven imbibition of a porous medium under microgravity conditions: Experimental investigation and mathematical modeling

Dushin, V.R. / Smirnov, N.N. / Nikitin, V.F. / Skryleva, E.I. / Weisman, Yu.G.

Abstract The paper considers the process of imbibition in a porous medium under the action of capillary forces in microgravity. A description of experiments on the repeated imbibition of an artificial porous medium during parabolic flights is given. In some experiments, the porous medium is homogeneous; in others, the experimental cell contains regions with different permeability. The analysis of non-stationary and convective terms in the equation of momentum conservation and their influence on the imbibition process is carried out. The results of numerical modeling of the process of repeated imbibition under the action of capillary forces under microgravity in an inhomogeneous porous medium are presented. The results of numerical modeling are compared with experimental data.

Highlights • The paper considers the imbibition of fluid into a porous medium in microgravity. • The mathematical model that takes into account hysteresis is proposed. • The experimental results for various porous media are described. • The results of numerical modeling are compared with experimental data.