This study investigates the predominant criteria in the persistence or decay of vortex flows in porous media. A simple approach is used to build a pair of vortices in a fluid. The vortices impinge on a permeable wall, thus allowing a study of the interaction of vortices with the porous medium. New insights are obtained, among them that permeability has a more important effect on this interaction compared with either porosity or the vortex transport velocity.
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