IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Experimental and numerical modelling of scour at bridge piers
Experimental and numerical modelling of scour at bridge piers
Author : I. Andrés-Doménech1, F.J. Vallés Morán1, G. Palau-Salvador2, Hans Bihs3, Alberto Fernández Ortego2, E. Albentosa Hernández1 and J. Martínez Corral4
Scour around bridge piers is an important problem during floods. Laboratory experiments and numerical simulations are carried out to understand scour hole evolution around piers and then, how to mitigate this process. Experiments are conducted with a 0.065 m wide and 2.1 m long channel. The numerical code SSIIM, developed in Trondheim University, is used to solve the unsteady Navier- Stokes equations with a diffusion-convection equation to model erosion processes. Cylindrical piers are tested with a flat sand-bed channel. Steady flow conditions are established from different initial depth conditions: from dry channel to depths around 10 cm. Thus, steady velocities were around 0.15 m/s. A single pier as well as a group of piers are analysed to describe scour evolutions and factors involved in the process. Numerical results achieved a good accuracy when compared against experiments, showing, moreover, the importance of the horse-shoe vortex in the scour process.
File Size : 701,547 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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