Shocks in supersonic sand

被引：121

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

页码：4 / 143024

页数：4

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