2004/03/29 by G. Rousseaux, H. Caps, J. -E. Wesfreid
Physics and Astronomy · #cond-mat.soft #cond-mat.mtrl-sci
paper · pdf · doi:10.1140/epje/e2004-00055-x
published as Eur Phys J E 13, 213-219 (2004) · 8 pages
arxiv created 2004/03/29 · arxiv updated 2009/12/01
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.