A two-species continuum model for aeolian sand ripples

Details A two-species continuum model for aeolian sand ripples A two-species continuum model for aeolian sand ripples

1999-10-16

arxiv.org/abs/cond-mat/9910252v1

Physics

Condensed Matter

Materials Science

9 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.83.5170

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.

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