Concept

Charge (hydraulique)

Publications associées (160)

Discharge Capacity of Piano Key Weirs

Anton Schleiss, Martin Peter Bieri, Marcelo Leite Ribeiro

In recent years, spillway rehabilitation has increased in importance and become the subject of many projects worldwide. One solution for this problem is the implementation of a new type of labyrinth spillway, called Piano Key Weir (PK-Weir ). This is an ex ...

2012

Experimental Identification and Study of Hydraulic Resonance Test Rig with Francis Turbine operating at Partial Load

François Avellan, Arthur Tristan Favrel, Christian Landry, Andres Müller

Resonance in hydraulic systems is characterized by pressure fluctuations of high amplitude which can lead to undesirable and dangerous effects, such as noise, vibration and structural failure. For a Francis turbine operating at partial load, the cavitating ...

International Association For Hydraulic Research2012

Two-phase frictional pressure drops in U-bends and contiguous straight tubes for different refrigerants, orientations, tube, and bend diameters: Part 1. Experimental results (RP-1444)

John Richard Thome, Ricardo Lima

Over the years, much research has been conducted on two-phase flows in straight tubes because these tend, in length, to be predominant in two-phase systems. However, two-phase heat exchangers can also have singularity elements, where the most common type i ...

Taylor & Francis Inc2012

Piano Key Weirs as efficient spillway structure

Anton Schleiss, Michael Pfister, Marcelo Leite Ribeiro

With increasing of hydrological data records and the development of technologies for flood discharge estimation, as well as higher requirements on dam safety issues, a large number of existing dams require spillway rehabilitation to improve their hydraulic ...

2012

Self-Sealing of Localised Cracks in Boom and Opalinus Clay Hollow Cylinders

Laurent Gastaldo, Vincent Labiouse, Jean-François Mathier

The SELFRAC project aimed to study the fractures within the Excavation Damaged Zone (EDZ) around galleries in the Boom clay and Opalinus clay formations and their possible sealing/healing with time. Tests carried out at LMR-EPFL aimed at quantifying on the ...

European Commission2012

Contribution of Stern layer and membrane polarization to spectral induced polarization of variably saturated sandy soils

Alessandro Brovelli

Spectral induced polarization is receiving increasing attention as a tool to map subsurface properties in a non-invasive manner. Although empirical correlations have been devised to link measurements to porous medium properties, such as the time constant o ...

2012

Wave-induced watertable fluctuations, sediment transport and beach profile change: Modeling and comparison with large-scale laboratory experiments

David Andrew Barry, Alessandro Brovelli, Roham Bakhtyar

Coastal groundwater systems can have a considerable impact on sediment transport and foreshore evolution in the surf and swash zones. Process-based modeling of wave motion on a permeable beach taking into account wave-aquifer interactions was conducted to ...

Elsevier2011

Influence of tributary widening on confluence morphodynamics

Marcelo Leite Ribeiro

Confluences are the nodes of the fluvial network. They are typically characterized by highly heterogeneous conditions that are favorable for a sound fluvial ecosystem, and play a key role in the connectivity of the river system. During the past centuries, ...

EPFL - LCH2011

Hyporheic flow under periodic bed forms influenced by low-density gradients

David Andrew Barry

Small density variations due to low solute concentrations in the stream water commonly exist in streams and rivers. Using laboratory experiments and numerical modeling, we demonstrated that even such small density variations could influence the hyporheic f ...

American Geophysical Union2011

Effects of Wave Characteristics and Beach Groundwater Table on the Nearshore Morphology and Aquifer Dynamics

David Andrew Barry, Alessandro Brovelli, Roham Bakhtyar

A RANS model was coupled with a coastal aquifer model. ...

2011

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