Physics – Geophysics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3422401m&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 22, CiteID L22401
Physics
Geophysics
13
Hydrology: Erosion, Hydrology: Debris Flow And Landslides, Nonlinear Geophysics: Phase Transitions, Volcanology: Volcanic Hazards And Risks, Oceanography: General: Numerical Modeling (0545, 0560)
Scientific paper
The partial fluidization model developed by Aranson and Tsimring (2002) is used to simulate the spreading of a 2D circular cap of granular material over an erodible bed made of the same material. Numerical results show that the presence of even a very thin layer of granular material lying on the solid bed strongly increases the mobility of granular flows. Furthermore, as the thickness of the granular layer increases, the dynamics of the flowing mass changes from a decelerating avalanche to a traveling wave. Numerical simulation suggest that surges are generated if enough mass is entrained, increasing the energy of the flowing material and balancing the energy lost by friction.
Aranson Igor S.
Bouchut Francois
Mangeney Andre
Tsimring Lev S.
Volfson Dmitri
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