Granular size segregation in underwater sand ripples

Details Granular size segregation in underwater sand ripples Granular size segregation in underwater sand ripples

2004-03-29

arxiv.org/abs/cond-mat/0403682v1

Eur Phys J E 13, 213-219 (2004)

Physics

Condensed Matter

Soft Condensed Matter

8 pages

Scientific paper

10.1140/epje/e2004-00055-x

We report an experimental study of a binary sand bed under an oscillating water flow. The formation and evolution of ripples is observed. The appearance of a granular segregation is shown to strongly depend on the sand bed preparation. The initial wavelength of the mixture is measured. In the final steady state, a segregation in volume is observed instead of a segregation at the surface as reported before. The correlation between this phenomenon and the fluid flow is emphasised. Finally, different ``exotic'' patterns and their geophysical implications are presented.

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