In 2018 the City of London published requirements for the development of new buildings in the square mile. The objective of the wind guidelines is to assess the impact of tall building on the wind micro-climate and evaluate its effects on pedestrians, cyclists and to ensure that open spaces in the urban environment are comfortable and safe for the public.
Five years ago modelling the wind environment within a city, around a building and at street level was time consuming and expensive. However the development of digital twins of cities (3d models) such as London and Frankfurt in conjunction with major improvements in computer hardware and software means that wind modelling is now achievable at reasonable cost.
Other cities will follow London’s example and wind modelling to assess micro climates and air quality will become a requirement for obtaining planning consent. The image below shows wind velocities at ground level with particularly high velocities along roads and adjacent to buildings.