Wind wake analysis under thermal stratification conditions

The evolution analysis of the wind wake downstream of a machine submerged in a stratified Atmospheric Boundary Layer is discussed in this work. The hybrid model BEM_AD-CFD is used, to obtain the velocity field. The changes in thermal stratification conditions are taken into account when solving the energy conservation equation. Results from the unstable stratification case indicate 41% velocity deficit at z=1D. 30% is found for stable condition at z=1D. In a stratified Atmospheric Boundary Layer, an isolated wind turbine's ability to produce electricity is more impacted by stable condition than by unstable ones.