Publication

Aerated flows on stepped chutes with macro-roughness elements, Part II : Energy dissipation

Anton Schleiss, Stéphanie Joëlle André
2008
Journal Articles

Abstract

An experimental research of flow on different systems of stepped overlays for 18.6 degrees and 30 degrees slopes was conducted. In addition to define flow characteristics (Part I), the study highlighted the existence of an homogeneous aerated flow in which drag effect caused by the macro-roughness contribute significantly in the energy dissipation process. The analysis of the different flow depths and of several macro-roughness systems lead to an accurate method for estimation of residual energy of the aerated turbulent flow. Finally, based on the hydraulic behaviour of aerated turbulent flow and on the measured pressures on macro-roughness elements as well as on the energy dissipation efficiency of the tested systems, recommendations for the design of an optimal protection overlay for overtopped embankment dams are given.

Official source

https://infoscience.epfl.ch/entities/publication/2cd20a51-aacb-4025-b19e-e207f4db0329

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Anton Schleiss, Stéphanie Joëlle André
2008
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2cd20a51-aacb-4025-b19e-e207f4db0329

About this result

Related concepts (32)

Laminar flow

In fluid dynamics, laminar flow (ˈlæmənər) is characterized by fluid particles following smooth paths in layers, with each layer moving smoothly past the adjacent layers with little or no mixing. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another like playing cards. There are no cross-currents perpendicular to the direction of flow, nor eddies or swirls of fluids. In laminar flow, the motion of the particles of the fluid is very orderly with particles close to a solid surface moving in straight lines parallel to that surface.

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