Two-species continuum model for aeolian sand ripples

被引:25
作者
Hoyle, RB
Mehta, A
机构
[1] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 9EW, England
[2] SN Bose Natl Ctr Basic Sci, Calcutta 700091, W Bengal, India
关键词
D O I
10.1103/PhysRevLett.83.5170
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We formulate a continuum model for aeolian sand ripples consisting of two species of grains: a lower layer of relatively immobile clusters, with an upper layer of highly mobile grains moving on top. We predict analytically the ripple wavelength, initial ripple growth rate, and threshold saltation flux for ripple formation. Numerical simulations show the evolution of realistic ripple profiles from initial surface roughness via ripple growth and merger.
引用
收藏
页码:5170 / 5173
页数:4
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