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Mean Flow and Turbulence Statistics Over Groups of Urban-like Cubical Obstacles
Direct numerical simulations of turbulent flow over regular arrays of urban-like, cubical obstacles are reported. Results are analysed in terms of a formal spatial averaging procedure to enableExpand
A canopy model of mean winds through urban areas
SUMMARY An urban canopy model is developed for spatially averaged mean winds within and above urban areas. The urban roughness elements are represented as a canopy-element drag carefully formulatedExpand
Structure of turbulent flow over regular arrays of cubical roughness
The structure of turbulent flow over large roughness consisting of regular arrays of cubical obstacles is investigated numerically under constant pressure gradient conditions. Results are analysed inExpand
Unsteady dynamics and organized structures from DNS over an idealized building canopy
A numerical study is performed to elucidate the dominant turbulent processes that occur in urban areas. Comprehensive data from direct numerical simulations (DNS) over idealized three-dimensionalExpand
Large-Eddy Simulation of Flows over Random Urban-like Obstacles
Further to our previous large-eddy simulation (LES) of flow over a staggered array of uniform cubes, a simulation of flow over random urban-like obstacles is presented. To gain a deeper insight intoExpand
Dispersion of a Point-Source Release of a Passive Scalar Through an Urban-Like Array for Different Wind Directions
The dispersion of a point-source release of a passive scalar in a regular array of cubical, urban-like, obstacles is investigated by means of direct numerical simulations. The simulations areExpand
Variation of the Sectional Drag Coefficient of a Group of Buildings with Packing Density
Reynolds-averaged Navier–Stokes (RANS) simulations of turbulent flow over groups of buildings with different packing densities are reported. The results for a selected packing density are comparedExpand
Mean Winds Through an Inhomogeneous Urban Canopy
The mean flow within inhomogeneous urban areas is investigated using an urban canopy model. The urban canopy model provides a conceptual and computational tool for representing urban areas in a wayExpand
Wind-Direction Effects on Urban-Type Flows
Practically all extant work on flows over obstacle arrays, whether laboratory experiments or numerical modelling, is for cases where the oncoming wind is normal to salient faces of the obstacles. InExpand
Spatial Variability of Flow Statistics within Regular Building Arrays
Turbulence statistics obtained by direct numerical simulations are analysed to investigate spatial heterogeneity within regular arrays of building-like cubical obstacles. Two different array layoutsExpand