Competitive dynamics of two erosion patterns around a cylinder
Fluid Dynamics
2018-03-09 v3 Soft Condensed Matter
Geophysics
Abstract
We investigate experimentally the local erosion of a granular bed near a fixed vertical cylinder that emerges from the bed. The onset of erosion arising at the base of the cylinder and usually ascribed to the wrapping horseshoe vortex is determined and rationalized by a flow contraction effect. We report a new erosion pattern visible downstream of the cylinder that consists of two side-by-side elongated holes. This pattern is observed for flow regimes close to the horseshoe scour onset, whose growth usually inhibits its spatiotemporal development.
Cite
@article{arxiv.1801.05835,
title = {Competitive dynamics of two erosion patterns around a cylinder},
author = {F. Lachaussée and Y. Bertho and C. Morize and A. Sauret and P. Gondret},
journal= {arXiv preprint arXiv:1801.05835},
year = {2018}
}
Comments
6 pages, 6 figures