Numerical Simulations of Boundary-Layer Airflow Over Pitched-Roof Buildings

Abstract Arrays of buildings with pitched roofs are common in urban and suburban areas European cities. Large-eddy simulations performed to predict the boundary-layer flows over flat pitched-roof cuboids gain a greater understanding impact on boundary layers. The simulation methodology is validated for an array roof cuboids. Further show that changes type grid conformity have negligible effect mean flow field turbulent stresses, while having visible, but small, dispersive stresses given packing density. Comparisons made $$45^\circ $$ 45 ∘ cuboid arrays at densities 16.7% 33.3%. interactions between their layer considerably different those flat-roof buildings. density 33.3% leads significant field, Reynolds aerodynamic drag. work investigates effects turbulence level atmospheric thermal stratification approaching flow. Importantly, comparison array, one evidently increase friction velocity greatly reduces stable conditions inflow level.