1. Particle Transport, Deposition and Resuspension
G. Ahmadi, K. Nazridoust, P. Zamankhan and F-G. Fan
Center for Advanced Materials Processing
Clarkson University, Potsdam, NY
Xerox Corporation, Webster, NY

2. Outline
Computational Modeling of Particle Transport, Resuspension and Deposition
Outdoor
- Buildings, Peace Bridge, Street Canyons
Indoor
- Rooms
Respiratory
- Lung and Nose Deposition

3. PARTICLE-SURAFCE CONTACT
Rough Surface mg

4. Comparison with Zimon Greenwood and Williamson (1966)
Fuller and Tabor (1975)
Johnson et al. (1976)
Soltani and Ahmadi (1995)

5. Pairs of Attached Particles
Detachment Model for
Pairs of Attached Particles
Rolling Detachment Model
Detachment of Upper Sphere
Detachment of Particle Pair

6. Micrograph of Lactose Particle

7. Critical Shear Rate 1 2
Lactose
polycarbonate

8. Peace Bridge
Buffalo
Canada
Lwebuga-Mukasa (2001)

9. Peace Bridge
Luebuga-Mukasa (2004)

10. Geometric Features of Computational Domain
Canada
Buffalo
Geometric features of the computational domain and the grid.

11. Airflow Velocity Contours
Near Peace Bridge

12. Peace Bridge

14. Peace Bridge
Jacque and Ferro (2004)

15. Peace Bridge
Jacque and Ferro (2004)

16. Street Canyons

17. Particle Dispersion Patterns - Asymmetric Street Canyon

19. Airflow and Pollutant Transport in a Building

20. Conclusions
Computer simulation provides a reasonable tool for studying pollutant transport and deposition.
The Eulerian-Lagrangian method for dilute pollutant transport and deposition may be sufficient.
Particle size and density as well as the airflow velocity and turbulence intensity significantly affect the deposition process.