A simple model of aeolian megaripples

被引：20
|
作者：
Yizhaq, H [1 ]
机构：
[1] Ben Gurion Univ Negev, BIDR, IL-84990 Sede Boqer, Israel
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2004年 / 338卷 / 1-2期
关键词：
sand ripples; megaripples; saltation; reptation;
D O I：
10.1016/j.physa.2004.02.044
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We discuss a simple mathematical model for the formation of aeolian megaripples. The main idea is that the sediment consists of a mixture of grains with two different sizes and that the wind is not strong enough to cause the coarse fraction to saltate. Linear stability analysis indicates the presence of two maxima in the growth rate of the unstable modes. The gravest mode corresponds to megaripples and the other to "standard" aeolian ripples. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：211 / 217
页数：7
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