Distributions of gust and peak factors at a pedestrian level in a simplified urban canopy obtained by particle image velocimetry

The complex velocity fields within an urban canopy affect the occurrence of rare weak and strong wind-speed phenomena at pedestrian level. Although particle image velocimetry (PIV) is widely used to determine components, it has not been applied spaces for wind events, owing surrounding buildings. Therefore, in this study, two components a simplified layer were measured using time-resolved PIV by inserting laser optics system into focal block. We determined turbulent statistics, probability densities, gust factor (GF), peak (PF) level layer. density functions positions with lower mean speed tend be negatively skewed, whereas those higher become closer Gaussian distribution. GF values are small regions where larger observed. However, PF shows less distribution than GF, regardless measurement position. Owing importance gusts, could more useful index evaluating winds