Abstract
We report the analysis of radial characteristics of the flow of granular
material through a conical hopper. The discharge is simulated for
various orifice sizes and hopper opening angles. Velocity profiles are
measured along two radial lines from the hopper cone vertex: along the
main axis of the cone and along its wall. An approximate power law
dependence on the distance from the orifice is observed for both
profiles, although differences between them can be noted. In order to
quantify these differences, we propose a Local Mass Flow Index that is a
promising tool in the direction of a more reliable classification of the
flow regimes in hoppers.
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