University of Toronto
Physics Department
Quantum Optics and Condensed Matter
University of Toronto
Physics Department
Quantum Optics and Condensed Matter
| Speaker : | Professor Stephen Morris Department of Physics University of Toronto |
| Topic : | TRAVELLING SAND WAVES: FUN WITH GRANULAR SEGREGATION PATTERNS |
| Time : | Monday, September 28, 1998 at 12:30 p.m. |
| Place : | Room 408, Burton Tower 60 St. George Street / 255 Huron Street |
Abstract
Unlike fluids, dry granular materials often stubbornly refuse to mix when shaken or stirred. These "segregation" effects are common in many processes involving grains, from cake mixes to gunpowder. I will describe recent experiments on segregation along the axis of a partially filled, horizontal rotating tube - a "drum mixer". We experimentally discovered a rich segregation dynamics that involves travelling structures, in contrast to what one might have expected from simple physical models..
Contact: Professor S. Morris
(416-978-6810)
See http://www.physics.utoronto.ca/~qocmp