AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Particle Resuspension from Surface, Current State of the Art
BABAK NASR, Jing Qian, Meilu He, Morgan Minyard, Andrea R. Ferro, Goodarz Ahmadi, Suresh Dhaniyala, Clarkson University
Abstract Number: 587 Working Group: Environmental Fate of Infectious Aerosols
Abstract The resuspension rate of particles from surfaces via rolling detachment depends on the properties of the particles, surface, and environmental airflow as well as other conditions. In this study, a large collection of results of experimental particle resuspension studies have been assimilated into a GUI program to visualize and analyze the data. In addition, the different existing physics-based theoretical approaches for particle removal were integrated into the GUI to allow for a direct comparison of data with the models. A sensitivity analysis was conducted to determine the sensitivity of the critical shear velocity to the particle/substrate material properties and roughness parameters. The results of this sensitivity analysis are presented, along with the current state of the resuspension data and its comparison against different model predictions. Also, the critical particle-substrate parameters determined from this comparison are described. The analysis of the experimental data suggests that the diversity of the available results is best predicted theoretically using models that include the surface roughness and non-spherical “bumpy” particles.