Longitudinal Vortices in Granular Flows
- 25 June 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 86 (26) , 5886-5889
- https://doi.org/10.1103/physrevlett.86.5886
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.Keywords
All Related Versions
This publication has 24 references indexed in Scilit:
- Granular flowsAdvances in Physics, 2000
- Scales and kinetics of granular flowsChaos: An Interdisciplinary Journal of Nonlinear Science, 1999
- Stability of plane Couette flow of a granular materialJournal of Fluid Mechanics, 1998
- Hydrodynamics and Nonlinear InstabilitiesPublished by Cambridge University Press (CUP) ,1998
- Fingering in granular flowsNature, 1997
- Granular solids, liquids, and gasesReviews of Modern Physics, 1996
- Localized excitations in a vertically vibrated granular layerNature, 1996
- Instability of unbounded uniform granular shear flowJournal of Fluid Mechanics, 1992
- Subharmonic Instabilities and Defects in a Granular Layer under Vertical VibrationsEurophysics Letters, 1989
- The three-dimensional nature of boundary-layer instabilityJournal of Fluid Mechanics, 1962