Large eddy simulation of wind flow around parallel buildings with varying configurations

The paper presents numerical calculations of turbulent wind flow conditions around two parallel buildings with different wind directions and building arrangements. The numerical simulations are carried out with the RNG sub-grid scale model following an initial test case for a single building configuration with the time averaged and filtered Navier-Stokes equations based turbulence models. A comparison with the experimental data indicates that the present RNG sub-grid scale model gives much better results than other turbulence models tested to predict the time-dependent atmospheric flow field. This model is further extended to analyse the wind effects between buildings by considering different building geometry, wind flow direction and passage width. All numerical simulations are carried out by using the finite volume method (FVM). The simulation results show that the present sub-grid scale model with the FVM is rather promising to study the wind effects on buildings and can overcome the disadvantages of conventional Reynolds averaged Navier-Stokes equations based turbulence models. (C) 2002 Published by The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved.