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Evolution of the cascade duration (A and C) and the penetration length (B and D) as functions of the number of plugs (A and B) and applied pressure (C and D) for a set of monodisperse plugs of length 0.78 mm separated by 2.1 mm. In A and B, the pressure head is 2.0 kPa. Squares correspond to experiments, solid lines to the full model, and dash/dotted curves to predictions from the model without plug interactions.
