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Measurements and computations of flow in an urban street system

Castro, IP, Xie, Z-T, Fuka, V, Robins, AG, Carpentieri, M, Hayden, P, Hertwig, D and Coceal, O (2017) Measurements and computations of flow in an urban street system Boundary-Layer Meteorology: an international journal of physical and biological processes in the atmospheric boundary layer.

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Abstract

We present results from laboratory and computational experiments on the turbulent flow over an array of rectangular blocks modelling a typical, asymmetric urban canopy at various orientations to the approach flow. The work forms part of a larger study on dispersion within such arrays (project DIPLOS) and concentrates on the nature of the mean flow and turbulence fields within the canopy region, recognis- ing that unless the flow field is adequately represented in computational models there is no reason to expect realistic simulations of the nature of the dispersion of pollutants emitted within the canopy. Comparisons between the experimental data and those ob- tained from both large-eddy simulation (LES) and direct numerical simulation (DNS) are shown and it is concluded that careful use of LES can produce generally excellent agreement with laboratory and DNS results, lending further confidence in the use of LES for such situations. Various crucial issues are discussed and advice offered to both experimentalists and those seeking to compute canopy flows with turbulence resolving models

Item Type: Article
Subjects : Mechanical Engineering Science
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
AuthorsEmailORCID
Castro, IPUNSPECIFIEDUNSPECIFIED
Xie, Z-TUNSPECIFIEDUNSPECIFIED
Fuka, VUNSPECIFIEDUNSPECIFIED
Robins, AGUNSPECIFIEDUNSPECIFIED
Carpentieri, MUNSPECIFIEDUNSPECIFIED
Hayden, PUNSPECIFIEDUNSPECIFIED
Hertwig, DUNSPECIFIEDUNSPECIFIED
Coceal, OUNSPECIFIEDUNSPECIFIED
Date : 7 March 2017
Copyright Disclaimer : The final publication will be available at Springer via http://dx.doi.org/
Uncontrolled Keywords : Direct numerical simulation · Large-eddy simulation · Urban environ- ment · Wind-tunnel modelling
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 07 Sep 2016 09:33
Last Modified : 07 Sep 2016 09:33
URI: http://epubs.surrey.ac.uk/id/eprint/812005

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