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Nature 459, 1064-1065 (25 June 2009) | doi:10.1038/4591064a; Published online 24 June 2009
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Granular media: Structures in sand streams
Detlef Lohse1 & Devaraj van der Meer1
Abstract
An ingenious experiment that involves dropping a costly, high-speed video camera from a height of several metres reveals how free-falling streams of granular matter, such as sand, break up into grain clusters.
It is common knowledge that when a stone is thrown into a pond, a jet of water shoots upwards. High-speed video imaging and even snapshots taken with short exposure times reveal that the jet breaks up into droplet patterns.
- Detlef Lohse and Devaraj van der Meer are in the Physics of Fluids Group, Department of Science and Technology, J. M. Burgers Center, and at the Impact and Mesa+ Institutes, University of Twente, PO Box 217, 7500 AE Enschede, the Netherlands.
Email: d.lohse@utwente.nl
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RESEARCH
High-speed tracking of rupture and clustering in freely falling granular streamsNature Letters to Editor (25 Jun 2009)
