Segregation-driven organization in chaotic granular flows

被引：137
|
作者：
Hill, KM [1 ]
Khakhar, DV [1 ]
Gilchrist, JF [1 ]
McCarthy, JJ [1 ]
Ottino, JM [1 ]
机构：
[1] Northwestern Univ, RR McCormick Sch Engn & Appl Sci, Evanston, IL 60208 USA
来源：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 1999年 / 96卷 / 21期
关键词：
D O I：
10.1073/pnas.96.21.11701
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
An important industrial problem that provides fascinating puzzles in pattern formation is the tendency for granular mixtures to de-mix or segregate. Small differences in either size or density lead to flow-induced segregation. Similar to fluids, noncohesive granular materials can display chaotic advection; when this happens chaos and segregation compete with each other, giving rise to a wealth of experimental outcomes. Segregated structures, obtained experimentally, display organization in the presence of disorder and are captured by a continuum flow model incorporating collisional diffusion and density-driven segregation. Under certain conditions, structures never settle into a steady shape. This may be the simplest experimental example of a system displaying competition between chaos and order.
引用
收藏
页码：11701 / 11706
页数：6
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