Transverse instability of avalanches in granular flows down an incline.

  title={Transverse instability of avalanches in granular flows down an incline.},
  author={Igor Aranson and Florent Malloggi and Eric Cl{\'e}ment},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={73 5 Pt 1},
Avalanche experiments on an erodible substrate are analyzed using the "partial fluidization" model of dense granular flows. The model identifies a family of propagating solitonlike avalanches with shape and velocity controlled by the inclination angle and the depth of the substrate. At high inclination angles, the solitons display a transverse instability, followed by coarsening and fingering similar to recent experimental observation. A primary cause for the transverse instability is directly… CONTINUE READING