1. Street Canyon Modeling
(using Dr. Nenes Model )
Paula Agudelo
Carlos Hoyos
11/26/2003

2. The Idea H W
Formulation of the problem geometry

3. The Model “Eddy diffusivity”
Numerically solve the Navier-Stokes equations by using a finite volume
descretization formulation.
The k - epsilon model consists of the turbulent kinetic energy equation
The codes are also capable of solving for turbulent flows: the standard two-parameter k-epsilon model can be used to estimate the Reynolds stresses.
In the implementation of this model the Kolmogorov - Prandtl expression for the turbulent viscosity is used
and the dissipation rate equation
“Eddy diffusivity”

4. Case 1

5. Laminar Case

6. Case 2

7. Case 2 (V=3m/s)

8. Laminar Case

9. Case 3

10. Case 4

11. Case 5

12. Case 6

13. Case 6 (source away from the building )

14. Scaling
Under same atmospheric conditions building height becomes essential in the TKE generation!!

15. Dispersion depending on W/H ratio

17. Dispersion depending on Separation

19. Comparison with The microscale model MIMO,