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A Particle Resuspension Model in Ventilation Ducts

A turbulent burst model is used and evaluated for particle resuspension in ventilation ducts in this study. The model is a prolongation of the turbulent burst model developed by Cleaver and Yates with an approach to the critical jump-start air velocity for particle resuspension. This critical jump-start air velocity is introduced to estimate the fraction of particles resuspended under the turbulent burst. The model results were compared with experimental data that is available in literature. Both the model results and experiments show that resuspension rate increased with the increase of particle diameter and air speed in ducts. However, the model results did not show a significant decay of particle resuspension rate over time, which was shown in the experiments. Limitations of the model are discussed to explain the discrepancy between the model and the experimental results. Copyright 2012 American Association for Aerosol Research