This paper presents a water-channel simulation of flow and turbulence in the urban boundary layer. The goal is to assess the role played by the aspect ratio (AR) of the street canyon, assumed as an archetype for more complex and realistic urban fabrics. The physical model consists of a series of two-dimensional obstacles used to mimic a regular array of buildings. Velocity measurements are performed using image analysis. Results show a dependence of the mean velocity and turbulence parameters on AR. Attention is particularly focused on the turbulent kinetic energy and its production-advection-dissipation mechanisms that occur in the urban canopy. © 2015 Inderscience Enterprises Ltd.

On the effect of the aspect ratio on flow and turbulence over a two-dimensional street canyon

QUERZOLI, GIORGIO
2015

Abstract

This paper presents a water-channel simulation of flow and turbulence in the urban boundary layer. The goal is to assess the role played by the aspect ratio (AR) of the street canyon, assumed as an archetype for more complex and realistic urban fabrics. The physical model consists of a series of two-dimensional obstacles used to mimic a regular array of buildings. Velocity measurements are performed using image analysis. Results show a dependence of the mean velocity and turbulence parameters on AR. Attention is particularly focused on the turbulent kinetic energy and its production-advection-dissipation mechanisms that occur in the urban canopy. © 2015 Inderscience Enterprises Ltd.
building; street canyon; urban canopy; turbulent kinetic energy; aspect ratio; skimming flow; wake interference regime
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11584/178508
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