Abstract
We have studied the effect of gas-grain interaction on the flow of sand for two different experiments. The first experiment deals with the intermittent flow observed in a closed hour-glass. The intermittency results from a coupling between the flow of sand and convection of air through the sand. The second experiment deals with the oscillatory flow observed in an open silo. In this case a local mechanism is caused by dilation of the granular material and interaction with the interstitial air is responsible for the observed oscillations.
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Måløy, K.J. et al. (1998). Granular Flow in Hoppers and Tubes. In: Herrmann, H.J., Hovi, JP., Luding, S. (eds) Physics of Dry Granular Media. NATO ASI Series, vol 350. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2653-5_37
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DOI: https://doi.org/10.1007/978-94-017-2653-5_37
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