Statistical analysis of wind speed near urban surfaces of simplified block arrays

Abstract

Author performed large eddy simulation of simplified urban arrays to clarify statistical characteristics of wind speed at a pedestrian level, and the followings are obtained. (1) Probability density of wind speed at a pedestrian level can be expressed almost universally among several geometries by defining stochastic variable normalized by mean and standard deviation of wind speed except for the range of strong wind. (2) Gust factors defined by the wind speed exceed a criteria were calculated based on the probability density. These Gust factors give acceptable estimation of strong wind speed.