Longitudinal Vortices in Granular Flows

Details Longitudinal Vortices in Granular Flows Longitudinal Vortices in Granular Flows

2001-08-30

arxiv.org/abs/cond-mat/0108516v1

Phys. Rev. Lett. vol.86 p5886-5889 (2001)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.86.5886

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.

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