Internal structure of powder-snow avalanches.

Simulation of Mixture Flows : Pollution Spreading and Powder–Snow Avalanches

We are concerned with the numerical simulation of certain multi-fluids flows, which in particular arise in the modeling of pollutant spreading and powder–snow avalanches. The behavior of the mixture is described through a single mass density and a velocity field, with an unusual constraint that relates the divergence of the velocity to derivatives of the density. We propose a numerical scheme b...

Frontal dynamics of powder snow avalanches Supplementary online material

Its gradient along a streamline is “favorable” (∂pus/∂s) < 0 for y > b′ − x, and “adverse” (∂pus/∂s) > 0 for y < b′ − x. On the interface where ψ = 0 and r = b′θ/ sin θ, pus(ψ = 0) vanishes at x = b′/2 ahead of the source (θ ' 10π/27), and is always < 0 downstream of that point. Because the interface has favorable pressure gradient until θ = θf ' 13π/20, and adverse ∀θ > θf , it is convenient t...

Mechanics of snow avalanches

The main problems of mechanics of snow avalanches are those of: (1) predicting avalanches, (2) avalanche motion, (3) the action of an avalanche upon obstacles, (4) the air wave, (5) the slow moving snow cover and its interaction with protective constructions and (6) the problem of artificial release of avalanches. This paper surveys the modern state of scientific knowledge about the nature of p...

Snow Avalanches, Ice Avalanches and Glacier Surges

Kulikovskiy–Sveshnikova–Beghin model of powder snow avalanches: Development and application

[1] A simple theoretical model, the Kulikovskiy–Sveshnikova–Beghin (KSB) model, is outlined, describing the motion of a particle cloud moving down an incline. This model includes both the entrainment of surrounding ambient fluid and the entrainment of particles from the slope and is equally valid for Boussinesq and non-Boussinesq flows. However, this model can predict physically impossible dens...