Technical Description of Urban Microscale Modeling System: Component 1 of CRTI Project 02-0093RD


  1. Yee, E.
  2. Lien, F.S.
  3. Ji, H.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN);Waterloo CFD Engineering Consulting Inc., Waterloo ON (CAN)
This report provides a technical description of the models that comprise Component 1 of a 4-year Chemical, Biological, Radiological and Nuclear Research and Technology Initiative (CRTI) Project 02-0093RD entitled “An Advanced Emergency Response System for Chemical Biological Radiological and Nuclear (CBRN) Hazard Prediction and Assessment for the Urban Environment” whose primary objective is the development of an advanced, fully validated, state-of-the-science modeling system for the prediction of urban flow (i.e., turbulent flow through cities) and the concomitant problem of modeling the dispersion of CBRN agents released in a populated urban environment. The principal module of Component 1 is urbanSTREAM, which is a general second-order accurate finite-volume code designed for the simulation of urban flow using a two-equation turbulence closure model (namely, the standard κ-ε model and the limited-length-scale κ-ε model). Component 1 also incorporates a module (urbanGRID) for the automatic generation of grids in the computational domain when provided with detailed geometric information on the shapes and locations of buildings in the urban environment in the form of Environmental Systems Research Institute (ESRI) Shapefiles. Finally, Component 1 also includes modules for the prediction of urban dispersion in the Eulerian framework: namely, urbanEU which is an Eulerian grid dispersion model based on numerical solution of a K-theory advection-di

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Urban Flow Prediction;Urban Dispersion;Computational Fluid Dynamics;Numerical Methods in Fluids;Model Validation
Report Number
DRDC-SUFFIELD-TR-2007-067 — Technical Report
Date of publication
01 Mar 2007
Number of Pages

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