湿颗粒堆流中的非定常流与非均匀堆积
软凝聚态物质
2018-10-03 v1
摘要
我们实验研究了在单分散玻璃球中加入少量水时,准二维颗粒堆中从定常流向非定常流的转变。在低含水量下,颗粒沿堆两侧均匀流动;但随着含水量增加,出现非定常流。该非定常流模式由不沉积的顺坡雪崩与逆坡传播的颗粒跃波组成。由于水致内聚力的作用,当坡度超过临界角时发生从定常流向非定常流的转变。在非定常流条件下,沉积堆由疏松层与致密层构成,其形成与非定常流动力学密切相关。
引用
@article{arxiv.1806.04315,
title = {Unsteady flows and inhomogeneous packing in damp granular heap flows},
author = {Hongyi Xiao and John Hruska and Julio M. Ottino and Richard M. Lueptow and Paul B. Umbanhowar},
journal= {arXiv preprint arXiv:1806.04315},
year = {2018}
}
备注
10 pages, 8 figures