Street canyon flow regimes are classified using the time-averaged mean flow. The present paper discusses recent work on the dynamics of street canyon flows (important for pollutant transport) and the interaction with the shear layer and atmospheric boundary layer above, with a view to classifying the different regimes in terms of the unsteady characteristics of the flow for different types of c...

The urban canyon albedo (UCA) quantifies the ability of street canyons to reflect solar radiation back sky. UCA is controlled by reflectance road and façades geometry. This study investigates variability in a typical residential area London its impact on outdoor indoor microclimates. results are based measurements real 1:10 physical model simulations using ENVImet v 4.4.6 EnergyPlus. Different ...

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...

Abstract Pollutant dispersion in urban street canyons has been widely investigated by large-eddy simulation (LES). Many LES studies focused on generic under a wind direction perpendicular to the axis. Accurate simulations require sufficiently large domain size minimize effects of artificial boundary conditions at faces results. As opposed RANS simulations, there is lack guidelines for an approp...

Abstract. In the urban environment, gas and particles impose adverse impacts on health of pedestrians. The conventional computational fluid dynamics (CFD) methods that regard pollutants as passive scalars cannot reproduce formation secondary lead to uncertain prediction. this study, SSH-aerosol, a modular box model simulates evolution gas, primary aerosols, is coupled with CFD software, OpenFOA...

Circulation near a submarine canyon is analyzed with a numerical model. Previous theoretical work indicated that stratification controlled the interaction of coastal flow with canyons, specifically, the ratio of canyon width to the internal radius of deformation. A wide canyon was thought to merely steer the flow, while a narrow canyon would create substantia• cross-shelf exchange. Four cases a...

Estimation of the location of a Mobile Station accurately is a key requirement to effectively provide a wide range of Location Based Services over mobile networks. Hence developing cellular positioning techniques has been a key research problem, with numerous localization solutions been proposed. These include technologies such as Cell ID, angle and time of arrival methods, statistical methods ...

Accurate and globally referenced positioning is the key prerequisite for fully successful autonomous systems. Global Navigation Satellite System (GNSS) could provide global service in open areas. Unfortunately, under denes urban areas, which it typical systems to operate, performance of GNSS suffers from non-line-of-sight (NLOS) receptions multipath effects caused by signal reflection blockage ...