Abstract
The motion of granular material is not readily predicted by the techniques developed for either fluid or solid mechanics. Although there are many industrial applications (i.e. transport of coal, grain, powder, salt etc.), this field still requires more rigorous scientific analysis. Experiments conducted with the flow of several (non-cohesive) granular materials through a slot indicate the existence of three flow regions. These regions may be catalogued into domains described by: (I) soil mechanics; (II) free-particle flow; and (III) frictional flow. It is also observed that a choking phenomenon occurs in which the slot velocity attains a critical maximum value independent of the slot area or height of the material. An analysis of this interdisciplinary topic and an explanation of the experimental observations is presented.
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