Shocks in supersonic sand
软凝聚态物质
2009-11-07 v4 介观与纳米尺度物理
摘要
We measure time-averaged velocity, density, and temperature fields for steady granular flow past a wedge and calculate a speed of granular pressure disturbances (sound speed) equal to 10% of the flow speed. The flow is supersonic, forming shocks nearly identical to those in a supersonic gas. Molecular dynamics simulations of Newton's laws and Monte Carlo simulations of the Boltzmann equation 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
@article{arxiv.cond-mat/0104474,
title = {Shocks in supersonic sand},
author = {E. Rericha and C. Bizon and M. D. Shattuck and H. L. Swinney},
journal= {arXiv preprint arXiv:cond-mat/0104474},
year = {2009}
}
备注
4 pages, 5 figures