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Turbulent flows and pollution dispersion around tall buildings using adaptive large eddy simulation (LES)

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Title: Turbulent flows and pollution dispersion around tall buildings using adaptive large eddy simulation (LES)
Authors: Aristodemou, E
Mottet, L
Constantinou, A
Pain, C
Item Type: Journal Article
Abstract: The motivation for this work stems from the increased number of high-rise buildings/skyscrapers all over the world, and in London, UK, and hence the necessity to see their effect on the local environment. We concentrate on the mean velocities, Reynolds stresses, turbulent kinetic energies (TKEs) and tracer concentrations. We look at their variations with height at two main locations within the building area, and downstream the buildings. The pollution source is placed at the top of the central building, representing an emission from a Combined Heat and Power (CHP) plant. We see how a tall building may have a positive effect at the lower levels, but a negative one at the higher levels in terms of pollution levels. Mean velocities at the higher levels (over 60 m in real life) are reduced at both locations (within the building area and downstream it), whilst Reynolds stresses and TKEs increase. However, despite the observed enhanced turbulence at the higher levels, mean concentrations increase, indicating that the mean flow has a greater influence on the dispersion. At the lower levels (Z < 60 m), the presence of a tall building enhanced dispersion (hence lower concentrations) for many of the configurations.
Issue Date: 10-Jul-2020
Date of Acceptance: 1-Jul-2020
URI: http://hdl.handle.net/10044/1/81239
DOI: 10.3390/buildings10070127
ISSN: 2075-5309
Publisher: MDPI AG
Start Page: 1
End Page: 34
Journal / Book Title: Buildings
Volume: 10
Issue: 7
Copyright Statement: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: RG80519
Keywords: Science & Technology
Technology
Construction & Building Technology
tall buildings
large eddy simulation
air pollution dispersion
turbulence
PEDESTRIAN-LEVEL WIND
VENTILATION
ENVIRONMENT
DENSITIES
TRANSPORT
TUNNEL
CITY
1201 Architecture
1202 Building
1203 Design Practice and Management
Publication Status: Published
Online Publication Date: 2020-07-10
Appears in Collections:Earth Science and Engineering
Faculty of Engineering



This item is licensed under a Creative Commons License Creative Commons