Pattern formation of dunes

被引：14
作者：
Herrmann, Hans-J.
机构：
[1] Univ Stuttgart, Inst Comp Applicat 1, D-70569 Stuttgart, Germany
[2] Univ Fed Ceara, BR-60020181 Fortaleza, Ceara, Brazil
来源：
NONLINEAR DYNAMICS | 2006年 / 44卷 / 1-4期
关键词：
pattern formation; dunes; saltation;
D O I：
10.1007/s11071-006-2016-3
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Dunes are aerodynamic instabilities of a mobile ground. Only recently, the equations of motion of a free granular surface born by air and gravity have been established. I will present the equations and analyze their stability. A numerical solution gives very good quantitative agreement with field measurements. As function of wind velocity and the amount of sand, various patterns are reproduced. I will discuss in particular barchan dunes that under certain conditions behave like solitons and can in other cases breed offspring. Also practical applications like protection against desertification will be discussed.
引用
收藏
页码：315 / 327
页数：13
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