Shocks in supersonic sand

被引：120
|
作者：
Rericha, EC [1 ]
Bizon, C
Shattuck, MD
Swinney, HL
机构：
[1] Univ Texas, Ctr Nonlinear Dynam, Austin, TX 78712 USA
[2] NW Res Associates Inc, Colorado Res Associates Div, Boulder, CO 80301 USA
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.88.014302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measure time-averaged velocity, density, and temperature fields for steady granular flow past a wedge. We find the flow to be supersonic with a speed of granular pressure disturbances (sound speed) equal to about 10% of the flow speed, and we observe shocks nearly identical to those in a supersonic gas. Molecular dynamics simulations of Newton's laws yield fields in quantitative agreement with experiment. A numerical solution of Navier-Stokes-like equations agrees with a molecular dynamics simulation for experimental conditions excluding wall friction.
引用
收藏
页码：4 / 143024
页数：4
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