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Publications associées (41)
Dynamic environmental flows using hydrodynamic-based solutions for sustainable hydropower
Giovanni De Cesare, Paolo Perona
Water diversions from rivers and torrents for anthropic uses of the resource alter the natural flow regime. As a measure, environmental flows have been prescribed and often are enforced by law to follow policies (e.g., minimal flow, proportional redistribu ...
CRC Press/Balkema2023Nitrate removal and young stream water fractions at the catchment scale
Despite extensive research on nitrate export and removal, nutrient contamination remains a major threat to water bodies worldwide. At the local scale, nitrate removal is governed by biogeochemical conditions that vary in space and time, making integration ...
WILEY2020Motor-wheel for an omni-directional mechanism and vehicle using the same
The present invention relates to a motor-wheel for an omni-directional motion vehicle, comprising a ring-shaped structure with a central axis, presenting an outer radial surface and an inner radial surface, whereby the outer radial surface comprises a plur ...
2020GPU-accelerated numerical analysis of jet interference in a six-jet Pelton turbine using Finite Volume Particle Method
François Avellan, Ebrahim Jahanbakhsh, Audrey Paulette Solange Maertens, Sebastián Camilo Leguizamón Sarmiento, Siamak Alimirzazadeh, Christian Vessaz, Takashi Kumashiro
The Pelton turbine is an impulse turbine typically installed for high head hydroelectric power plants. For a site with a rated head H and discharge Q, a higher specific speed turbine results in a more compact generating unit with reduced manufacturing cost ...
2020Mean kinetic energy distribution in finite-size wind farms: A function of turbines' arrangement
Varun Sharma, Marc Calaf Bracons, Roberto Torres Sánchez
In this work the redistribution and recovery of mean kinetic energy in a realistic, finite size wind farm is studied for neutral atmospheric boundary layer conditions. Five different wind farm configurations, with different wind turbine arrangements, are c ...
PERGAMON-ELSEVIER SCIENCE LTD2020The Demographics of Water: A Review of Water Ages in the Critical Zone
The time that water takes to travel through the terrestrial hydrological cycle and the critical zone is of great interest in Earth system sciences with broad implications for water quality and quantity. Most water age studies to date have focused on indivi ...
2019Identification of Train Wheel Flat Accounting for Measurement and Modeling Uncertainties
In railway systems, wear-induced wheel flats (out-of-roundness wheel shape) are among the most common local surface defects. They reduce the train ride comfort, increase fatigue risk and raise safety concerns. A good knowledge of wheel flats (presence and ...
2019GPU-accelerated Pelton turbine simulation using finite volume particle method coupled with linear eddy viscosity models
François Avellan, Ebrahim Jahanbakhsh, Audrey Paulette Solange Maertens, Sebastián Camilo Leguizamón Sarmiento, Siamak Alimirzazadeh, Takashi Kumashiro
The numerical investigation of the unsteady flow patterns around a Pelton bucket can be helpful to improve the overall turbine efficiency by optimizing the bucket design based on identified loss mechanisms. Since the flow is highly turbulent, modeling the ...
IOP PUBLISHING LTD2019Implantable fluid delivery device
Nikolaos Stergiopoulos, Michel Bachmann
An implantable delivery device for delivering a fluid in a controlled manner, including a body having a chamber, a tube having an inlet and an outlet, at least a portion of the tube passing through the chamber, a drive pinion operatively connected to a mot ...
2019Integrated sediment management of alpine rivers
Giovanni De Cesare, Christian Mörtl
Sediment management of alpine rivers is crucial to ensure sustainable hydropower production. Dams inhibit not only biological consistency but also drastically restrain natural sediment dynamics. Upstream of the dam, coarse material is accumulated, leading ...
2019