Capillary fracturing in granular media.

@article{Holtzman2012CapillaryFI,
  title={Capillary fracturing in granular media.},
  author={Ran Holtzman and Michael L. Szulczewski and Ruben Juanes},
  journal={Physical review letters},
  year={2012},
  volume={108 26},
  pages={
          264504
        }
}
We study the displacement of immiscible fluids in deformable, noncohesive granular media. Experimentally, we inject air into a thin bed of water-saturated glass beads and observe the invasion morphology. The control parameters are the injection rate, the bead size, and the confining stress. We identify three invasion regimes: capillary fingering, viscous fingering, and "capillary fracturing," where capillary forces overcome frictional resistance and induce the opening of conduits. We derive two… CONTINUE READING

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