Formation of aeolian ripples and sand sorting
Edgar Manukyan, Leonid Prigozhin
TL;DR
This paper introduces a continuous model that captures key features of aeolian sand ripples, including their shape, growth dynamics, size segregation, and armoring layers, reflecting realistic behaviors observed in natural sand ripples.
Contribution
The model is capable of reproducing realistic ripple shapes, coarsening, saturation, and sand segregation phenomena, advancing understanding of aeolian ripple formation.
Findings
Realistic asymmetric ripple shapes produced by the model
Coarsening of ripple fields during nonlinear growth stages
Size segregation and armoring layers observed in inhomogeneous sand
Abstract
We present a continuous model capable of demonstrating some salient features of aeolian sand ripples: the realistic asymmetric ripple shape, coarsening of ripple field at the nonlinear stage of ripple growth, saturation of ripple growth for homogeneous sand, typical size segregation of sand and formation of armoring layers of coarse particles on ripple crests and windward slopes if sand is inhomogeneous.
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