A new urban canopy parameterization scheme for wind environment simulations

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)402–422
Journal / PublicationIndoor and Built Environment
Volume27
Issue number3
Online published13 Nov 2017
Publication statusPublished - 1 Mar 2018

Abstract

This paper concerns urban canopies populated with tall slender buildings. To clarify the controlling factors of urban canopies, we simulated a series of single high-rise buildings under fully developed turbulence at a realistic scale by large-eddy simulation (LES). We then analyzed correlations between the drag force and recirculation area, frontal area, surface area, floor area, porosity and inlet velocity. Our results show that the recirculation length and recirculation area were proportional to the width, height and wind speed, but was inversely proportional to the length of building. New equations for the recirculation length and area are presented. The maximum error of the recirculation length equation was 6.66%, and the maximum error of the recirculation area equation was 7.49%. The drag source characteristic length was found to be proportional to the recirculation area, frontal area and surface area; and inversely proportional to the porosity and height, but was not closely related to floor area. A new local scale drag source model was developed and applied to a complex urban canopy of Xi’an. The model was applied to 7 x 7 buildings and show good agreement with the solid wall simulation results.

Research Area(s)

  • High-rise building, Urban canopy parameterization, Frontal area, Recirculation area, Wind environment

Citation Format(s)

A new urban canopy parameterization scheme for wind environment simulations. / Duan, Cuie; Lu, Weizhen; Zhang, Yunwei et al.
In: Indoor and Built Environment, Vol. 27, No. 3, 01.03.2018, p. 402–422.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review