White paper 
Atmospheric boundary layer modelling

 

In this white paper, discover the following.

From the general characteristics of the atmospheric boundary layer to the impact of thermal effects and stability on turbulence, passing through the Monin-Obukhov's similarity theory, this white paper covers all the knowledge needed for the atmospheric boundary layer modeling.
It details the numerical models available for its computation, focusing on the RANS model (k-ε, k-ω, k-L), more suitable for industrial use or for complex site configurations.

But what is the atmospheric boundary layer?
It is located in the troposphere and is composed of the Ekman layer, the surface boundary layer ( SBL ) and the rough underlay.

What is its impact on the wind?
Atmospheric dynamics are strongly influenced by the surface between 100m and 3000m, resulting in turbulent flows with high spacial-temporal variations. The presence of the surface causes mechanical or thermal inhomogeneities because of mountains, valleys, buildings, vegetation, or heat exchanges between the ground and the air.
The modeling of the atmospheric boundary layer is therefore necessary to accurately model the wind flow.

About the authors

Eric Tromeur

PhD in applied mathematics since 2004, Eric has more than 17 years of experience in mesoscale meteorology, weather forecasts, climate change and wind industry. He is the Director of Meteodyn's Research, Innovation, Service and Expertise and the Head of Wind, Meteorology and Climate Division.

Stéphane Sanquer

PhD in Aerodynamics and Energetics, Stéphane has more than 20 years of experience in wind and building engineering. He was the Deputy Managing Director and Director of Research and Development of Meteodyn until 2020. Stéphane is now in charge of the synergy and development of subsidiaries within CSTB.





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