1. Longitudinal Vortices in Granular Flows
- Author
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Olivier Pouliquen, Yoël Forterre, Institut universitaire des systèmes thermiques industriels (IUSTI), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Surface (mathematics) ,business.product_category ,numbers: 4570Mg ,General Physics and Astronomy ,FOS: Physical sciences ,Deformation (meteorology) ,Condensed Matter - Soft Condensed Matter ,4570Qj ,01 natural sciences ,Instability ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,[SPI]Engineering Sciences [physics] ,0103 physical sciences ,4732Cc ,Inclined plane ,010306 general physics ,Physics ,[PHYS]Physics [physics] ,Mechanics ,Vortex ,Volumetric flow rate ,Flow (mathematics) ,Free surface ,Soft Condensed Matter (cond-mat.soft) ,business - 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., Comment: 4 pages, 4 figures
- Published
- 2001
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