Item: Snow avalanche dynamics as a granular fluid phenomenon
Title: Snow avalanche dynamics as a granular fluid phenomenon
Proceedings: 1990 International Snow Science Workshop, Bigfork, Montana USA, October 9-13
Authors: Jimmie D. Dent
Abstract: Theory and experiment are combined to produce a picture of how stresses in idealized granular materials depend upon the flow kinematics and material properties of an idealized granular material. The theory is based upon simple mechanical interaction of the discrete particles:making up a rapidly shearing flow. Although still a long way from determining a general constitutive law for the motion of nonuniform particles such as snow and ice, the results obtained so far are indicative of the behavior that has been observed in avalanches for many years and give a mechanical foundation for many of the dynamic theories that have been used to predict avalanche speed and runout distance.
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Keywords: flow kinematics, shearing flow, constitutive law, nonuniform particles
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