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2D PIV Measurements of Street Canyon Flow for Buildings with Varying Angles and Separation Distances
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The observations indicate that having the upwind building at an angle to the incoming boundary layer (with the downwind building remaining normal) significantly modifies the flow field typically associated with a traditional two dimensional street canyon. As the angle of the upwind building is increased from 0 to 45 degrees, the momentum flux down into the canyon is significantly enhanced near the downwind building. It is also observed that increasing the angle of the upwind building modifies the flow in the wake, with the vortex core markedly shifting towards the downwind building as the angle of the upwind building increases from 0 to 45 degrees. Such mean wind observations along with turbulence observations made by varying the distances and angles of the buildings are presented in the paper.