Maximization of granular outflow by oblique exits and by obstacles

Bjöm Zelinski, Eric Goles, Mario Markus

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We investigate experimentally the intermittent discharge of a granular medium out of an exit at the bottom of a vertically shaken box. Changing the orientation of the bottom shows that there exists an angle (around 20°-25° with respect to the horizontal) at which the mean discharge rate increases up to a factor 1.9, as compared to the rate with horizontal bottom. Furthermore, adjusting the diameter and the distance of a cylindrical obstacle above the exit on the (horizontal) bottom, allows to optimize the mean rate of discharge up to 3.5 times the rate without obstacle.

Original languageEnglish
Article number031701
JournalPhysics of Fluids
Issue number3
StatePublished - 2009
Externally publishedYes


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