DAUC-Dynamics of Urban and Coastal Atmosphere

Investigating the dynamic and thermodynamic processes that take place in the lower atmosphere in urban and coastal environment, and their interaction with surfaces is the main research interest of the group Dynamics for urban and coastal Atmosphere (DAUC).
The research efforts of the DAUC group have the common objective of providing decision support for sustainable urban planning to face the issues of climate change and the evolution of coastal and continental cities. They aim to address societal and environmental challenges related to urban micro-climate, air quality or optimizing wind energy production.

The group employs complementary approaches for understanding physical processes driving the lower atmosphere, and for taking them into account to control aerodynamic surfaces:
 
  • Physical modeling in atmospheric wind tunnel for the study of turbulent flows
  • Field observation of the micro-climatology and micro-meteorology
  • Multi-scale numerical modeling of the coastal and urban atmosphere
  • Development of Input/Output dynamics models for flow control
> Read more about "DAUC Research areas"
The group maintains its own experimental facilities, but also benefits from the off-shore test site SEM-REV and the WindMorbihan network. Numerical simulations developed by the group are based on the concept of Large-Eddy Simulation of the turbulence and the derivation of dedicated models to account for the urban environment and its interactions with the atmospheric boundary layer. Analysis methods for data from both experiments and numerical simulations are developed in order to investigate and improve the understanding of the canopy-atmosphere turbulent transfers or to characterize the micro-meteorology of complex coastal sites. Experimental methods for the input/ouput modeling of complex systems are also derived in the framework of flow control.

Main test facilities of the research group


Atmospheric Wind Tunnel: This open-circuit wind tunnel is dedicated to the modeling and investigation of atmospheric boundary layer flows interacting with dense canopies. The test section is 26-meters-long, with a cross-section of 2m x 2m, with a maximum wind speed of 10 m/s. Besides the use of more classical techniques, measurements are mainly performed using Stereoscopic Particle Image Velocimetry (SPIV).
> Read more about Atmospheric wind tunnel

Aerodynamic Wind Tunnel: This closed-circuit wind tunnel is dedicated to the development and design of smart wind turbine blades. The test section is 0.8-meters-long, with a cross-section of 0.5m x 0.5 m, with a maximum wind speed of 40 m/s. This facility is equipped with a real-time acquisition system.

Read more about Aerodynamic wind tunnel



Nantes Observatory for Urban Environments (ONEVU): This observatory is dedicated to the long-term study of hydorology, micro-meteorology, and quality of air, water and soils in urban environments. Within the framework of Research Institute for Sciences and Techniques in Cities (IRSTV, FR CNRS 2488), the DAUC group develops the instrumentation required to analyse the relationship between the urban fabric and the local micro-climate (measurement of flux, wind temperature and moisture) (Read more) and to derive energy budget.
> Read more about ONEVU
Publié le March 27, 2017 Mis à jour le June 16, 2017