Tuesday, May 25

Vibrating Granular Media

10:00 AM-12:00 PM
Room: Ballroom II

Granular media are systems of macroscopic particles that interact mainly through contact forces. Granular media abound in nature and industry, but are not well understood. Recent laboratory experiments on granular media in oscillated containers have revealed a variety f collective phenomena--heaping, segregation, compaction, convection, spatial patterns, and clustering. The speakers in this minisymposium will describe the phenomena and molecular dynamics simulations developed to understand them. The simulations assume that the particles obey Newton's laws and that energy is dissipated in collisions. While simulations and pde models provide many open questions.

Organizer: Harry L. Swinney
University of Texas, Austin

10:00-10:25 Energy Flows, Segregation, and Collapse in Vibrated Granular Media
Stefan Luding, University of Stuttgart, Germany
10:30-10:55 Compaction and Thermodynamics in Vibrated Granular Media
Sidney R. Nagel, University of Chicago, Illinois
11:00-11:25 Stability and Dynamics of Vertically and Horizontally Shaken Sand
Robert P. Behringer, L. Kondic, S. Tennakoon, and R. Hartley, Duke University
11:30-11:55 Wave Patterns in Vertically Oscillated Granular Media
Chris Bizon, University of Texas, Austin

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LMH, 1/8/99, MMD, 2/9/99