Numerical modeling of an avalanche impact against an obstacle with account of snow compressibility

Authors: Kulibaba, V.S.; Eglit, M.E.

Source: Annals of Glaciology, Volume 49, Number 1, October 2008 , pp. 27-32(6)

Publisher: International Glaciological Society

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Abstract:

The numerical solution to a time-dependent two-dimensional problem of an avalanche impact against a wall is presented. The height of the wall is much larger than the flow depth. Compressibility of the moving snow as well as the effect of gravity is taken into account. Calculations are made for an impact of low-density avalanches with densities <100 kg m⁻³ obeying the equation of state for a mixture of two gases (air and gas of ice/snow particles). The pressure, density and velocity distributions in the flow as functions of time and space coordinates are calculated, as well as the variation of the flow depth. In particular, the flow height at the wall, the pressure at the wall and the pressure distribution on the slope near the wall are given, demonstrating peaks and falls due to compression shocks and rarefaction waves.

Document Type: Research article

DOI: 10.3189/172756408787814771

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