Nonlocal interface dynamics and pattern formation in gravity-driven unsaturated flow through porous media.

@article{CuetoFelgueroso2008NonlocalID,
  title={Nonlocal interface dynamics and pattern formation in gravity-driven unsaturated flow through porous media.},
  author={L. Cueto-Felgueroso and R. Juanes},
  journal={Physical review letters},
  year={2008},
  volume={101 24},
  pages={
          244504
        }
}
Existing continuum models of multiphase flow in porous media are unable to explain why preferential flow (fingering) occurs during infiltration into homogeneous, dry soil. Following a phase-field methodology, we propose a continuum model that accounts for an apparent surface tension at the wetting front and does not introduce new independent parameters. The model reproduces the observed features of fingered flows, in particular, the higher saturation of water at the tip of the fingers, which is… Expand
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