On flows in simulated urban canopies

摘要: Flow and turbulence within building canopies continue to be a topic of profound interest in the context pedestrian comfort, wind loading, contaminant dispersion energy usage populated urban areas. Many experimental studies have been reported on this topic, but they either deal with wind/water tunnel measurements (at low Reynolds numbers) or complex clusters (where results are site dependent difficult interpret). To avert such problems, an instrumented mock cluster made regular array man-sized objects (shipping containers) placed atmospheric boundary layer was used investigate spatial flow adjustment, patterns (as function approach angle) canopy. A new scaling is proposed for characteristic canopy velocity based morphology, which found perform well when evaluated against data. The adjustment at leading trailing edges good agreement formulation Belcher et al. (J Fluid Mech 488:369–398, 2003). applications developing simple fast transport models that can conjunction emergency response.