Simulation of Mean Flow and Turbulence Over a 2D Building Array Using High-Resolution CFD and a Distributed Drag Force Approach


  1. Lien, F.S.
  2. Yee, E.
  3. Cheng, Y.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN)
A numerical simulation has been performed of the disturbed flow through and over a two-dimensional array of rectangular buildings immersed in a neutrally stratified deep rough-walled turbulent boundary-layer flow. The model used for the simulation was the steady-state Reynolds-averaged Navier Stokes equations with linear and non-linear eddy viscosity formulations for the Reynolds stresses. The eddy viscosity was determined using a high-Reynolds number form of the k-epsilon turbulence-closure model with the boundary conditions at the wall obtained with a standard wall-function approach. The resulting system of partial differential equations was solved using the SIMPLE algorithm in conjunction with a non-orthogonal, collocated, cell-centered, finite volume procedure. The predictive capabilities of the high-resolution computational fluid dynamics (CFD) simulations of urban flow are validated against a very detailed and comprehensive wind tunnel data set. Vertical profiles of the mean streamwise, velocity and the turbulence kinetic energy are presented and compared to those measured in the wind tunnel simulation. TRUNCATED
CFD (Computational Fluid Dynamics);Atmospheric dispersion modeling;Atmospheric dispersion models
Report Number
DRDC-SUFFIELD-SL-2004-058 — Scientific Literature
Date of publication
19 Mar 2004
Number of Pages
Reprinted from
Journal of Wind Engineering and Industrial Aerodynamics; vol 92, 2004; p 117-158
Hardcopy;Document Image stored on Optical Disk

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