Sediment dynamics. Part 2. Dune formation in pipe flow
Sediment dynamics. Part 2. Dune formation in pipe flow
复制标题
DOI：
10.1017/s0022112009007927
复制
发表时间：
2009-09
影响因子：
3.7
通讯作者：
M. Ouriemi;P. Aussillous;É. Guazzelli
中科院分区：
文献类型：
--
作者：
M. Ouriemi;P. Aussillous;É. Guazzelli
我们展示了当由球形颗粒组成的床受到管道流影响时观察到的不同沙丘图案的相图。虽然初始运动的阈值由盾牌数决定，但沙丘形成的阈值似乎由雷诺数控制。由 Ouriemi、Aussillous 和 Guazzelli（J. Fluid Mech.，2009）得出的基于粒子通量的简单线性稳定性分析相当好地解释了实验观察结果。
We present a phase diagram of the different dune patterns observed when a bed composed of spherical particles is subjected to a pipe flow. While the threshold for incipient motion is determined by the Shields number, that for dune formation seems to be controlled by the Reynolds number. A simple linear stability analysis based on a particle flux derived by Ouriemi, Aussillous & Guazzelli (J. Fluid Mech., 2009) accounts reasonably well for the experimental observations.