Multiscale analysis of a very long wind turbine wake in an atmospheric boundary layer

In this work, we investigate the dynamics of very long wind turbine wakes (up to 215 rotor diameters), which includes the entire wake recovery process, for three ground surface roughness lengths. The focus is on how the flow structures of different scales vary as they pass through a wind turbine and travel to further downwind locations. Particularly, we examine the energy density in scale space and its evolution in the streamwise direction, providing insights into the range of scales influenced by a wind turbine and its wake.