Particle Transport, Deposition and Resuspension

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Presentation transcript:

Particle Transport, Deposition and Resuspension G. Ahmadi, K. Nazridoust, P. Zamankhan and F-G. Fan ahmadi@clarkson.edu, 315-268-2322 Center for Advanced Materials Processing Clarkson University, Potsdam, NY 13699-5725 Xerox Corporation, Webster, NY

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

PARTICLE-SURAFCE CONTACT Rough Surface mg

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

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

Micrograph of Lactose Particle

Critical Shear Rate 1 2 Lactose polycarbonate

Peace Bridge Buffalo Canada Lwebuga-Mukasa (2001)

Peace Bridge Luebuga-Mukasa (2004)

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

Airflow Velocity Contours Near Peace Bridge

Peace Bridge

Peace Bridge Jacque and Ferro (2004)

Peace Bridge Jacque and Ferro (2004)

Street Canyons

Particle Dispersion Patterns - Asymmetric Street Canyon

Airflow and Pollutant Transport in a Building

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.