Abstract

A mixing model for particles flowing through a vibrated two-dimensional hopper-shaped vessel is proposed, based on the observed flow pattern, and a transfer function is used for the expression of this model. Tests hare been carried out using an impulse tracer method and the results agree reasonably with predictions based on the model. Moreover, it is proved that the feed-back flow along the inclined side wall of the hopper has a large influence on mixing, so that an increase in the intensity of vibration, which increases the flow rate of feed-back, leads to better mixing.

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