Pattern Formation and Time-Dependence in Flowing Sandby R. P. Behringer, Duke Univ, Durham, United States,
G. W. Baxter, Duke Univ, Durham, United States,
Abstract: The authors present results for a number of experiments on flowing granular materials and a novel cellular automata model for the flow of these materials when the grains are long and thin. In the first experiment, they present results for the time-dependent stress associated with sand flow in a hopper. In a second set of experiments they show the existence of propagating fronts. These results imply that an additional degree of freedom, not included in conventional models, may be necessary, to describe the experiments. The authors describe experimental observations for the flow of materials with long thin grains; these experiments form the basis for the cellular automata model.
Subject Headings: Sandy soils | Granular materials | Automation | Time dependence | Soil stress | Grain (material) | Flow duration | Flow measurement
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