Author(s): Cecia Millan-Barrera, Gilberto Salgado Maldonado, Victor Arroyo

Linked Author(s): Cecia Millán-Barrera, gsalgado, Victor Arroyo

Keywords: Local scour; Predict equations; Laboratory data; Field data; Scour depth;

Abstract: The flow and the scour around a vertical circular pier exposed to a steady current is simulated with a three dimensional model and results compare with equations that determine the scour depth, they are based on laboratory and field data. This phenomenon is studied in two types of piles, the first one smooth, the second one with roughness imitating the surface of a golf ball. The results show that the scour depth around the pile with roughness increased by about 30%. As expected, the background patterns formed around the smooth stack were more extensive in the transverse direction than in the vertical one. Regarding the comparison of numerical results with the laboratory data equations, the results show very little agreement between them, they are closer when compared with the modified equations, especially the ones proposed by Arunachalam and Shein version I, both methods have in common that they are ones of the simpler and that the variables involved in them are hydraulic parameters and the geometry of the pier.

DOI: https://doi.org/10.3850/38WC092019-0813

Year: 2019