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Longitudinal Vortices in Granular Flows

Y. Forterre and O. Pouliquen
Phys. Rev. Lett. 86, 5886 – Published 25 June 2001
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Abstract

We present a new instability observed in rapid granular flows down rough inclined planes. For high inclinations and flow rates, the free surface of the flow experiences a regular deformation in the transverse direction. Measurements of the surface velocities imply that this instability is associated with the formation of longitudinal vortices in the granular flow. From the experimental observations, we propose a mechanism for the longitudinal vortex formation based on the concept of granular temperature.

  • Received 20 December 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.5886

©2001 American Physical Society

Authors & Affiliations

Y. Forterre and O. Pouliquen

  • Institut Universitaire des Systèmes Thermiques et Industriels (IUSTI), 5 rue Enrico Fermi, 13453 Marseille cedex 13, France

See Also

Swirling Sand Mimics Liquid and Gas

Geoff Brumfiel
Phys. Rev. Focus 7, 31 (2001)

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Vol. 86, Iss. 26 — 25 June 2001

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