Theories on channeling: reviewed and compared with experiments


Jongejan, M.P. (1990) Theories on channeling: reviewed and compared with experiments. Powder Technology, 61 (2). pp. 143-154. ISSN 0032-5910

open access
Abstract:Discharge of a cohesive bulk solid from a
plug-flow bin is (too) often interrupted by the
development of a stable channel within the
bulk solid. In this article, various methods to
determine critical outlet dimensions to avoid
channeling are reviewed critically and compared
with the results of experiments. It is
shown that the results of these methods vary
between an underestimation and an extreme
overestimation of the critical outlet dimensions.
Experiments have been performed using
different bins and bulk solids. In contrast to
what is generally assumed, these experiments
showed that critical outlet dimensions for
arching can be larger than those for channeling.
It also appeared that fitting a smooth
hopper underneath a bin results in a smaller
critical outlet than a flat bottom.
Item Type:Article
Copyright:© 1990 Elsevier
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