Speaker
Description
We study the invasion patterns when injecting the water with the injection rate of different magnitude into a layer of dry hydrophobic beads contained in a Hele-Shaw cell. We observed a decrease of characteristic finger width with the increase of granular volume fraction, an increase of number of fingers invaded simultaneously with the increase of injection rate, and an increase of finger width with the increase of the flow rate inside the finger. The invasion patterns are reproduced in simulation, and the theoretical models to explain and predict these observations are developed.
References
[1] James M Campbell, Deren Ozturk, and Bj?rnar
Sandnes. Gas-driven fracturing of saturated granu-
lar media. Phys. Rev. Appl., 8(6):064029, 2017.
[2] B Sandnes, H A Knudsen, K J M?al?y, and E G
Flekk?y. Labyrinth patterns in con?ned granular-fuid systems. Phys. Rev. Lett., 99(3):038001, 2007.
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