Diffusing-wave spectroscopy of dynamics in a three-dimensional granular flow

被引：169

作者：

Menon, N

Durian, DJ

机构：

[1] Department of Physics and Astronomy, University of California, Los Angeles

来源：

SCIENCE | 1997年 / 275卷 / 5308期

关键词：

D O I：

10.1126/science.275.5308.1920

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：

Diffusing-wave spectroscopy was used to measure the microscopic dynamics of grains in the interior of a three-dimensional flow of sand. The correlation functions show that minutely separated grains fly from collision to collision with large random velocities. On a time scale 10(3) to 10(4) times longer than the average time between collisions, the grains displayed slow, collective rearrangements, which, at the long-time limit, produced diffusive dynamics.

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页码：1920 / 1922

页数：3

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