Étude expérimentale du transport de sédiments dans un coude à 90 degrés

Details

Supervisors

Soares Frazao, Sandra

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions

Abstract

enA dam break is a terrible event in which a huge amount of water is suddenly released at a very high speed. The chance that such an event should occur is very rare but is not impossible. Indeed a few months ago an alert of a dam break was detected for the highest dam in the US, located in California. Because of the unknown risks, up to 200 000 people living downstream from the dam had to be evacuated. This situation shows the need to foresee the consequences of such an event in order to protect the population. For this reason, numerical models are used to simulate dam break events. In order to validate these models, experimental tests are performed. The present work aims to give experimental data’s in order to validate a two-dimensional finitevolume model. The experimental set-up is based on an idealized 90° bend. It integrates the difficulties found in reality, such as the intense sediment transport and the complex geometry due to the 90° bend. Different techniques of measurement have been used, such as the ultrasonic gauge and the lasersheet technique. Thanks to these techniques the evolution of the water and the bed levels have been computed together with the final topography of the bed. This work will be presented at the conference “10th Symposium on River, Coastal and Estuarine Morphodynamics” on September. The experimental results will be shown as well as the limits of the 2D numerical model