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The Spanwise Variation Of Roof-Level Turbulence In A Street Canyon Flow

The Spanwise Variation Of Roof-Level Turbulence In A Street Canyon Flow

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Title: The Spanwise Variation Of Roof-Level Turbulence In A Street Canyon Flow
Author: Jaroslawski, Tomek
Savory, Eric
Perret, Laurent
Blackman, Karin
Identifier: CSME150
Abstract: The effect of upstream roughness on turbulent street canyon flow is presented. Horizontal measurements were conducted at near roof level of a street canyon using particle image velocimetry in a wind tunnel. Three upstream roughness arrays and two canyon width to height aspect ratios (W / h = 1 and 3) were investigated. The arrays consisted of 3D cubes (plan area density, lp = 25%), 1h spaced 2D bars skimming flow, lp = 50%) and 3h spaced 2D bars (wake interference flow, lp = 25%). Two-point correlations and integral length scales are computed over the different configurations. The results show a significant effect of upstream roughness on these quantities. It was found that a 3D upstream roughness has a significantly weaker correlation in the spanwise direction. A similar trend is observed in spanwise integral length scales. The shear layer boundary was found to be related to the strength of the correlations near roof level of the street canyon.
Subject: Environmental Engineering
Boundary Layer
Street Canyon
Particle Image
Velocimetry
Wind Tunnel
Type: Article
Rights: The copyright for the paper content remains with the authors.
URI: http://hdl.handle.net/10315/35414
http://dx.doi.org/10.25071/10315/35414
Published: CSME-SCGM
Date: 2018-05

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