**2. Computational fluid dynamics for urban design and pedestrian level wind comfort between buildings**

In recent years, the computational fluid dynamics (CFD) technique has been widely used not only in environmental research, but also in building design and urban design processes, especially at the pedestrian level [26]. In a study completed in Japan, *Pedestrian Level Relationship between Building Forms and Streets Effects on the Condition… DOI: http://dx.doi.org/10.5772/intechopen.108735*

CFD applications in the pedestrian level wind environment were examined in detail, and Blocken (2014) reviewed CFD studies in wind engineering in the last 50 years [27, 28]. Also many studies have been carried out with CFD on both indoor comfort and energy performances and outdoor pedestrian level comfort, building facade pressure, speed values and design-comfort performance values [29–36]. In these studies, it is seen that CFD significantly reduces the costs of studies while allowing a more comprehensive and in-depth analysis of subjects that are objectively difficult to investigate experimentally [35–38]. When the comparing with wind tunnel testing and on-site monitoring technique, CFD simulation has some advantages such as whole flow wind data and low costs. A "comfortable climate environment" in an urban microclimatic environment is the most important parameter for human health and comfort. Therefore, in recent years, researches, research projects and studies on wind microclimate conditions at pedestrian level around both high-density and lowdensity buildings in urban areas have been increasing day by day [39–42].
