Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2003-10-04
Physics
Condensed Matter
Soft Condensed Matter
16 pages, submitted to Powder Technology
Scientific paper
Acceleration and sound measurements during granular discharge from silos are used to show that silo music is a sound resonance produced by silo quake. The latter is produced by stick-slip friction between the wall and the granular material in tall narrow silos. For the discharge rates studied, the occurrence and frequency of flow pulsations are determined primarily by the surface properties of the granular material and the silo wall. The measurements show that the pulsating motion of the granular material drives the oscillatory motion of the silo and the occurrence of silo quake does not require a resonant interaction between the silo and the granular material.
Muite Benson K.
Quinn Shandon F.
Rao Kesava K.
Sundaresan Sankaran
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