Concept

Wind speed

Publications associées (311)

Wind tunnel measurements of sediment mass fluxes in different dense live plant canopies

Michael Lehning, Benjamin Andreas Walter

Erosion, transport and deposition of soil or snow are processes that occur when the atmospheric turbulent boundary layer interacts with the ground. Vegetation on the ground is able to significantly modify these processes, usually resulting in reduced parti ...

2013

BIOPHYSICAL CONTROLS ON EVAPOTRANSPIRATION: NUMERICAL MODELS AND EXPERIMENTAL OBSERVATIONS

Federico Croci

Water and food are basics of human life, unfortunately climate changes and water pollution have reduced the amount of water available for human uses. In this context the study of the hydrologic cycle is becoming of growing importance in order to optimize t ...

2013

Sensor placement for predicting airflow around buildings to enhance natural ventilation

Ian Smith, Maria Papadopoulou

It is a challenge to design buildings that are both energy efficient and healthy. The factors that contribute to energy efficient and healthy buildings are related to both indoor and outdoor conditions. For example, the airflow around naturally ventilated ...

2013

A Plume Tracking Algorithm Based on Crosswind Formations

Alcherio Martinoli, Inaki Navarro Oiza, Thomas Lochmatter

We introduce a plume tracking algorithm based on robot formations. The algorithm is inherently designed for multi-robot systems, and requires at least two robots to collaborate. The robots try to keep themselves centered around the plume while moving upwin ...

Springer-Verlag Berlin2013

A Large Eddy Simulation Study for upstream wind energy conditioning

Varun Sharma, Marc Parlange, Marc Calaf Bracons

The wind energy industry is increasingly focusing on optimal power extraction strategies based on layout design of wind farms and yaw alignment algorithms. Recent field studies by Mikkelsen et al. (Wind Energy, 2013) have explored the possibility of using ...

2013

A Numerical Study of the Effects of Wind Direction on Turbine Wakes and Power Losses in a Large Wind Farm

Fernando Porté Agel, Yu-Ting Wu, Chang-Hung Chen

In this study, large-eddy simulations (LESs) were performed to investigate the effects of changing wind direction on the turbine wakes and associated power losses in the Horns Rev offshore wind farm. In the LES framework, the turbulent subgrid-scale stress ...

Mdpi Ag2013

Separating local topography from snow effects on momentum roughness in mountain regions

Michael Lehning, Marc Parlange, Gabriel George Katul, Marc Calaf Bracons, Marc Diebold

Parametrization of momentum surface roughness length in mountainous regions continues to be an active research topic given its application to improved weather forecasting and sub-grid scale representation of mountainous regions in climate models. A field c ...

2013

Snow cover runoff and stream discharge modelling during snow melt in Alpine terrain

Michael Lehning, Nander Wever, Mathias Thierry Pierre Bavay, Charles Fierz

The understanding of the role of snow cover runoff in complex terrain for the hydrological cycle is still limited. Water flow in snow is a complex process, because the strong layering of the snow cover causes strong vertical variation in hydraulic properti ...

2013

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts

Pénélope Leyland, Michele Gaffuri

Enhancing detached vortical flow over leading edges and flap surfaces allow high lift configurations in critical regimes of take-off and acceleration. In the context of the FP6 Environmentally Friendly High Speed Aircraft project HISAC, future high speed a ...

2013

Optimal Generation and Storage Scheduling in the Presence of Renewable Forecast Uncertainties

Jean-Yves Le Boudec, Dan-Cristian Tomozei, Nicolas Gabriel Gast

The increase in the penetration of wind in the current energy mix is hindered by its high volatility and poor predictability. These shortcomings lead to energy loss and increased deployment of fast-ramping generators. The use of energy storage compensates ...

2013

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