Journal ArticleDOI
The influence of building height variability on pollutant dispersion and pedestrian ventilation in idealized high-rise urban areas
TLDR
In this article, the link between building height and ground-level pollutants in street networks of high-rise urban areas has been investigated, and the results show that building height variab...About:
This article is published in Building and Environment.The article was published on 2012-10-01. It has received 319 citations till now.read more
Citations
More filters
Journal ArticleDOI
CFD simulation of outdoor ventilation of generic urban configurations with different urban densities and equal and unequal street widths
TL;DR: In this paper, a detailed review of the literature for CFD studies of outdoor ventilation for generic urban configurations is provided, which indicates that there is a clear lack of studies for urban configurations where not all parallel streets have equal street widths.
A numerical study of the effects of ambient wind direction on flow and dispersion in urban street canyons using the RNG k-ε turbulence model
TL;DR: In this article, a three-dimensional computational fluid dynamics model with the renormalization group k-e turbulence scheme was developed to investigate the effects of ambient wind direction on flow and dispersion around a group of buildings.
Journal ArticleDOI
Improving air quality in high-density cities by understanding the relationship between air pollutant dispersion and urban morphologies.
TL;DR: This study addresses the knowledge-gap between planning and design principles and air pollution dispersion potentials in high density cities with a real urban case study to demonstrate that the suggested design principles from the parametric study are feasible in the practical high density urban design.
Journal ArticleDOI
The effects of atmospheric stability with low wind speed and of air pollution on the accelerated transmission dynamics of COVID-19
TL;DR: In this article, the relation among atmospheric stability/turbulence (considering wind speed), air pollution and the spread of COVID-19 to provide insights into environmental degradation is investigated.
Journal ArticleDOI
Enhancing urban ventilation performance through the development of precinct ventilation zones: A case study based on the Greater Sydney, Australia
Bao-Jie He,Lan Ding,Deo Prasad +2 more
TL;DR: In this article, the authors developed a protocol for the precinct ventilation characterization based on the pluridisciplinary method and derived a precinct ventilation zone system according to the compactness + building height + street structure.
References
More filters
Journal ArticleDOI
Air pollution in mega cities in China
TL;DR: In this paper, the authors present the current state of understanding of the air pollution problems in China's mega cities and identify the immediate challenges to understanding and controlling air pollution in these densely populated areas.
Journal ArticleDOI
AIJ guidelines for practical applications of CFD to pedestrian wind environment around buildings
Yoshihide Tominaga,Akashi Mochida,Ryuichiro Yoshie,Hiroto Kataoka,Tsuyoshi Nozu,Masaru Yoshikawa,Taichi Shirasawa +6 more
TL;DR: In this paper, the authors present guidelines for using computational fluid dynamics (CFD) techniques for predicting pedestrian wind environment around buildings in the design stage, based on cross-comparison between CFD predictions, wind tunnel test results and field measurements.
Journal ArticleDOI
Street design and urban canopy layer climate
TL;DR: In this article, the authors investigated the results of recent urban canyon field studies and of scale and mathematical modelling to find a range of canyon geometries that are compatible with the apparently conflicting design objectives of mid-latitude cities.
Journal ArticleDOI
Near Wall Flow over Urban-like Roughness
Hong Cheng,Ian P. Castro +1 more
TL;DR: In this article, the authors have confirmed the strong three-dimensionalality of turbulent flow inthe roughness sublayer and the depths of the inertial sublayer (log-law region) and roughness subslayers for each surface have been determined.
Journal ArticleDOI
Mean Flow and Turbulence Statistics Over Groups of Urban-like Cubical Obstacles
TL;DR: In this article, a simulation of turbulent flow over regular arrays of urban-like, cubical obstacles is presented, and results are analyzed in terms of a formal spatial averaging procedure to enable interpretation of the flow within the arrays as a canopy flow, and of flow above as a rough wall boundary layer.