Hydraulic contacts controlling water flow across porous grains.

  title={Hydraulic contacts controlling water flow across porous grains.},
  author={Andrea Carminati and Anders Kaestner and Hannes Fl{\"u}hler and Peter B. Lehmann and Dani Or and Eberhard H. Lehmann and Marco Stampanoni},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={76 2 Pt 2},
Water flow between porous grains varies widely depending on the water distribution in contacts between grains. The hydraulic behavior of contacts varies from highly conductive when water fills the contacts to a bottleneck to flow as water pressure drops and contact asperities rapidly drain. Such changes greatly impact the hydraulic conductivity of porous grain packs such as aggregated soil. The dominant driving force of water flow across contacts is capillarity, often quantified relative to… CONTINUE READING