A Building-Resolved Wind Field Library for Vancouver: Facilitating CBRN Emergency Response for the 2010 Winter Olympic Games
DEFENCE RESEARCH AND DEVELOPMENT SUFFIELD (ALBERTA)
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This memorandum describes some initial work to construct a wind field library consisting of pre-computed building-aware mean wind and turbulence fields obtained from a high-resolution, high-fidelity computational fluid dynamics CFD model for a specific urban area namely, for the downtown area of Vancouver and the surrounding environs for use in on-demand CFD in support of emergency response applications requiring quick turnaround times for the 2010 Winter Olympic Games. To this purpose, mean wind and turbulence field simulations were obtained for 32 wind directions using CFD over a model computational domain of 255 km2 with a building-aware region of 10.4 km2 at 9-m horizontal resolution centered on downtown Vancouver. An example illustrating the application of the wind field library for the rapid calculation of urban dispersion for a release of a hazardous material in downtown Vancouver is provided.
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