Sedimentation instabilities: impact of the fluid compressibility and viscosity.

@article{Niebling2010SedimentationII,
  title={Sedimentation instabilities: impact of the fluid compressibility and viscosity.},
  author={Michael J Niebling and Eirik Grude Flekk\oy and Knut J\orgen M{\aa}l\oy and Renaud Toussaint},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2010},
  volume={82 5 Pt 1},
  pages={051302}
}
The effect of an interstitial fluid on the mixing of sedimenting grains is studied numerically in a closed rectangular Hele-Shaw cell. We investigate the impact of the fluid compressibility and fluid viscosity on the dynamics and structures of the granular Rayleigh-Taylor instability. First we discuss the effect of the fluid compressibility on the initial fluid pressure evolution and on the dynamics of the particles. Here, the emerging patterns do not seem highly affected by the compressibility… CONTINUE READING