Interdisciplinary Seminar in Nonlinear Science

Title: Dissipation in granular flow on a rough inclined plane
Speaker: Prof. S. Dippel
Speaker Info: FZ Juelich, Germany
Brief Description:
Special Note:

The flow of granular materials is governed by two sources of dissipation: friction and incomplete normal restitution in head-on collisions. Stable flow can only be obtained if this dissipation is balanced by a driving force applied to the system. In the case of granular flow on an inclined plane, where the material can dilate, a steady state can be reached only for a relatively small range of inclination angles. In this range of inclinations, correlations between successive collisions develop, which lead to a quite low influence of the coefficient of restitution on the mean velocity and velocity fluctuations, but a high influence of the friction coefficient. The existence of a steady state, however, does depend on the coefficient of restitution. Most of these results can be understood by examining in detail the motion of a single particle on a rough inclined plane. There, the development of these strong correlations even allows for a simple theoretical modeling of the problem. The talk will mainly discuss the single particle case and some of the consequences for many particle flow.
Date: Tuesday, May 13, 1997
Time: 3:00pm
Where: Tech 3396
Contact Person: Prof. Riecke
Contact email: h-riecke@nwu.edu
Contact Phone: 847-491-8316
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