Bandeau-company

Microclimate and urban planning

Raccourcis espace de connaissance

White paper - Numerical assessment of wind pedestrian comfort in complex urban spaces

For the urban designer, the knowledge of urban climatology and particularly that of wind flow around buildings is crucial in many applications, such as wind comfort in outdoor spaces and opened indoor spaces exposed to the wind. Wind flow dedicated CFD software provides an environment to understand and interpret the wind in any urban space. Wind mappings are useful to urban designers in order to optimize the site plan by positioning and orientating buildings to improve the pedestrian wind...
Optimization of numerical parameters in CFD tools to improve natural ventilation assessment in complex urban area

This paper presents a validation of a CFD numerical approach with optimized numerical parameters. Data from wind tunnel experiment is compared with numerical results on mean pressure coefficient. Numerical optimization investigates influence of inlet profile, mesh size and turbulence parameters. Suitable chosen numerical parameters can decrease discrepancies on pressure coefficient by 20%.
Validations and applications of a CFD tool dedicated to wind assessment in urban areas

UrbaWind is a CFD code developed by Meteodyn especially dedicated to urban wind applications with an automatic meshing and boundary conditions set-up. The paper shows validations by comparisons with experimental data proposed by the Architectural Institute of Japan (Tominaga et al., 2008). The first selected case is a wind-tunnel experiment of wind past a group of blocks, and the second one is a field experiment inside a quarter Niigata (Japan). Three examples of application in the outdoor...
WIND ASSESSMENT IN URBAN AREA WITH CFD TOOLS: APPLICATION TO NATURAL VENTILATION POTENTIAL AND OUTDOOR PEDESTRIAN COMFORT

The paper presents a numerical methodology to assess wind pedestrian comfort and natural ventilation. UrbaWind is an automatic computational fluid dynamics code. It was developed to model the wind in urban environments. The turbulence modelling, namely the dependance of turbulence length on the distance from wall, and the model constants were calibrated in order to reproduce with good agreements flow separation around...
DESIGN OF THE CITADEL OF BONIFACIO URBAN AREA THROUGH EXPERIMENTAL AND NUMERICAL ASSESSMENT OF PEDESTRIAN COMFORT

The city of Bonifacio, located at the extreme south end of Corsica Island, is said to be the windiest city of Europe, and has earned its nickname as “The daughter of The Wind”. The Montlaur Citadel is a district of Bonifacio located on a small peninsula. It is an ancient military facility composed of various massive barracks and churches. The peninsula is characterized by its high cliffs (60 m above the sea level) which make the Citadel particularly exposed to high wind. The city of...