.png){kind=icon}
返回
Three-dimensional river bed forms
.png){kind=icon}
PRE
AI
DOI：10.1017/jfm.2011.556.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The linear stability of a uniform flow in an infinitely wide erodible channel is investigated with respect to disturbances of the bed that are periodic in both the transverse and the longitudinal directions. A rotational flow and sediment transport model, originally developed to study the formation of two-dimensional dunes and antidunes, is straightforwardly extended to cover variations in the lateral direction. Sediment is assumed to be transported as bed load, disregarding the role of suspension. Following a standard linearization procedure, a dispersion relationship is obtained that expresses the growth rate and the celerity of the sand wave as a function of the streamwise and spanwise wavenumbers and of the relevant flow and sediment parameters. Regions of instabilities in the space of the parameters are found, which can be associated with bed forms of different kinds, spanning from dunes and antidunes to alternate bars. Therefore, the present theory allows for a unified view of the formation of two- and three-dimensional bed forms in rivers in terms of the relevant flow and sediment parameters.
Keyword:
river dynamics
sediment transport
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.9
论文数:
2.0W
被引数:
10.2W
机构
引用论文
Coupling or decoupling bed and flow dynamics: Fast and slow sediment waves at high Froude numbers.png)
PHYSICS OF FLUIDS
PHYSICS OF FLUIDSIF4.3
PREAI
分享收藏分享收藏Visual Target Sequence Prediction via Hierarchical Temporal Memory Implemented on the iCub Robot基于iCub机器人的层次化时序记忆视觉目标序列预测
PREAI
分享收藏分享收藏
Carbon Bioavailability in a High Arctic Fjord Influenced by Glacial Meltwater, NE Greenland受格陵兰岛东北部冰川融水影响的高北极峡湾中的碳生物利用度
OAAI
OAAI分享收藏
查看更多内容