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Article
Effects of building envelope features on airflow and pollutant dispersion within a symmetric street canyon
Building envelope features (BEFs) have attracted more and more attention as they have a significant impact on flow structure and pollutant dispersion within street canyons. This paper conducted CFD numerical m...
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Article
A wind tunnel study on flow instability and pollutant dispersion inside an isolated street canyon
The air quality in street canyons is closely related to the category of the street canyons and approaching wind conditions. Compared to urban street canyon (USC), flow and dispersion in isolated street canyon ...
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Article
Evaluation on ventilation and traffic pollutant dispersion in asymmetric street canyons with void decks
With continuous global warming, growing urban population density, and increasing compactness of urban buildings, the “void deck” street canyon design has become increasingly popular in city planning, especiall...
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Article
Influence of wind direction on the ventilation and pollutant dispersion in different 3D street canyon configurations: numerical simulation and wind-tunnel experiment
Configuration of street canyon and the wind environment have a great influence on the self-ventilation capacity of the canyon, but the couple-effect of these two factors could not be considered in the previous...
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Article
Effects of void deck on the airflow and pollutant dispersion in 3D street canyons
In general, urban canyons are the areas most clearly affected by traffic pollutants since the ability of the canyon to self-ventilate is inhibited due to blockage of buildings or other urban structures. Howeve...
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Article
New insights into quantifying deposition and aerodynamic characteristics of PM2.5 removal by different tree leaves
Particulate matter (PM) poses health risks to populations in urban areas worldwide. Urban vegetation, especially the tree leaves, is effective in capturing and removing PM from the surroundings. It is importan...
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Article
Numerical studies on issues of Re-independence for indoor airflow and pollutant dispersion within an isolated building
This study conducted the numerical models validated by wind-tunnel experiments to investigate the issues of Re-independence of indoor airflow and pollutant dispersion within an isolated building. The window Reyno...
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Article
Impacts of specific street geometry on airflow and traffic pollutant dispersion inside a street canyon
In this study, a validated CFD model is used to analyze the flow field and pollutant distribution in an isolated canyon (street aspect ratio, W/H = 1) by considering different street categories and arrangements o...
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Article
Numerical investigation of the thermal effect on flow and dispersion of rooftop stack emissions with wind tunnel experimental validations
The thermal effect on the flow and dispersion of pollutants emitted from a rooftop stack is investigated by means of CFD (computational fluid dynamics) models with wind tunnel experimental validations. The lee...
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Article
Comments on the paper “Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions”
In the recent paper, entitled “Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions” by Ayo et al. (2015) (Building Simulation, 8: 81–98), an...
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Article
Impacts of shape and height of upstream roof on airflow and pollutant dispersion inside an urban street canyon
A two-dimensional numerical model for simulating flow and pollutant dispersion in an urban street canyon is firstly developed using the FLUENT code and then validated against the wind tunnel results. After thi...
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Article
A Numerical Analysis of the Ventilation Performance for Different Ventilation Strategies in a Subway Tunnel
An unsteady three-dimensional analysis of the ventilation performance is carried out for different ventilation strategies to find out a ventilation method with a high performance in a subway tunnel. The natura...
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Article
A Numerical Study of the Train-Induced Unsteady Airflow in a Subway Tunnel with Natural Ventilation Ducts Using the Dynamic Layering Method
The objective of this study is to investigate numerically the characteristics of train-induced unsteady airflow in a subway tunnel with natural ventilation ducts. A three-dimensional numerical model using the ...
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Article
Numerical Studies on Airflow and Pollutant Dispersion in Urban Street Canyons Formed by Slanted Roof Buildings
Based on the CFD technique, fifteen cases were evaluated for the airflows and pollutant dispersions inside urban street canyons formed by slanted roof buildings. The simulated wind fields and concentration con...
