Convection in highly fluidized three-dimensional granular beds

Free, buoyancy-driven convection has been observed experimentally in three-dimensional highly fluidized granular flows for the first time. Positron emission particle tracking was used to determine the position of a tracer grain in a vibrofluidized bed, from which packing fraction distributions as we...

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Bibliographic Details
Published in:Physical review letters 2001-04, Vol.86 (15), p.3304-3307
Main Authors: Wildman, R D, Huntley, J M, Parker, D J
Format: Article
Language:English
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Summary:Free, buoyancy-driven convection has been observed experimentally in three-dimensional highly fluidized granular flows for the first time. Positron emission particle tracking was used to determine the position of a tracer grain in a vibrofluidized bed, from which packing fraction distributions as well as the velocity fields could be determined. The convection rolls, although small compared to the magnitude of velocity fluctuations (
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.86.3304