ABSTRACT
This chapter provides a step by step guide to the use of computational fluid dynamics (CFD) for assessing pedestrian comfort and air quality around buildings. It discusses the fundamental problems of the micro-scale CFD models, which lie in the physical difficulties of modelling the effect of turbulence, and also the accuracy of the spatial discretization of complex urban geometries, the numerical procedures applied, the boundary conditions and the physical property selected. The chapter presents two case studies: assess suitability of a general CFD code for use in the integrated urban air quality modelling for regulatory purposes in Glasgow; and assess the impact of a new building on air flow and pollution distribution in a district of Copenhagen. The air-flow pattern in a ventilated enclosure space such as rooms, offices, halls, theatres, this ventilation mainly divided into two different concepts: mixing ventilation and displacement one. Indoor air quality and thermal comfort are important factors in the design of high quality buildings.
