Shear Localization and Structuring in Granular Medium Flow in Radial Channel
S. V. Klishin, A. F. Revuzhenko
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
Keywords: Convergent channel, broken rock outlet, granular material flow, numerical modeling, laboratory experiment, discrete element method, shear strain localization
Abstract
The gravity flow of granular materials in axially symmetric convergent channels (V-shaped bunkers) is analyzed using the discrete element method. The symmetrical radial flow becomes unstable under certain conditions, and a space-time structure forms in the medium. The flow becomes essentially nonradial and asymmetric - the material is discretized into blocks, and the field of velocities inside the material becomes discontinuous. Further deformation reduces to relative movement of the blocks as rigid bodies.
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