Recent studies indicate the necessity of addressing traffic-related air pollution in urban environments, as street canyons are known for their lack natural ventilation and increased levels. To address this issue, numerous have been conducted on different aspects (e.g. aspect ratio, orientation height variation) impact dispersion/dilution performance canyons. Despite studies, information remains...

Partial isovists fields are useful methods to analyze the urban morphology taking into account the visual perception of the pedestrian. However, as previous studies involve a constant visual aperture angle all along the pathway, this paper presents an adaptative method of aperture angular variation according to urban morphology properties. Aperture angle increasing, nearby a square or at roads ...

Partial isovists fields are useful methods to analyze the urban morphology taking into account the visual perception of the pedestrian. However, as previous studies involve a constant visual aperture angle all along the pathway, this paper presents an adaptative method of aperture angular variation according to urban morphology properties. Aperture angle increasing, nearby a square or at roads ...

Abstract. The dispersion of cooking-generated aerosols from an urban street canyon is examined with building-resolving computational fluid dynamics (CFD). Using a comprehensive CFD model (PALM) sectional aerosol module (SALSA), emissions deep-frying and boiling are considered for near-ground elevated sources. With representative choices the source flux, inclusion dynamic processes decreases mea...

Despite their importance for pollutant dispersion in urban areas, the special features of dispersion at street intersections are rarely taken into account by operational air quality models. Several previous studies have demonstrated the complex flow patterns that occur at street intersections, even with simple geometry. This study presents results from wind tunnel experiments on a reduced scale...

Three dimensional simulations are carried out to estimate the effect of wind direction, wind speed and geometry on the flow and dispersion of vehicular pollutant in a street canyon. The pollutant sources are motor vehicles passing between the two buildings. Suitable emission factors for petrol and diesel vehicles at varying vehicle speed are used for the estimation of the rate of emission from ...

Greening of facades is a non-expensive option to increase the amount of vegetation in urban areas. Especially in areas with dense settlement, the filtering effect of facade greening can improve urban air quality. In this paper, results from field experiments and numerical simulations are presented. Using Atomic Absorption Spectrometry the amount of heavy metals on leaf samples from seven houses...

the concepts of democracy have been around for centuries in different fields of human sciences. however, in most of these fields the idealistic and far-fetched features attributed to democracy have not been manipulated yet. it should be mentioned that there have been only a few serious attempts to find proper go-between elements, which could make such a concept as comprehensible and tangible as...