Turbulence structures of the neutral atmospheric surface layer with a larger-scale disturbance captured by a PIV technique with a wind tunnel experiment

Abstract

Wind tunnel experiments were carried out to understand turbulence structures of the neutral atmospheric surface layer with larger-scale disturbances. The boundary layer was developed along a smooth flat plate in the measurement area. The movement of the active turbulence grid was controlled and the turbulence statistics in the logarithmic layer agreed with observations. Two dimensional wind fields obtained with PIV measurements revealed the existence of coherence structures, correspoinding to the eddy models.