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Numerical Modelling of Negative Air Ionization for Removing Viral Bioaerosols in an Enclosed Space

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  10th International Livestock Environment Symposium (ILES X)  .(doi:10.13031/iles.18-065)
Authors:   Desmond Essien, Qiang Zhang, David Levin, Kevin Coombs
Keywords:   . Bioaerosol, air ionization, reovirus

Abstract.

Air ionization has been applied successfully to remove non-pathogenic particulates such as smoke and dust, as well as pathogenic particulates suspended in air. This study presents a mathematical model that predicts the removal of bioaerosol in an enclosed chamber. The model employs a computational fluid dynamic (CFD) approach to predict the movement and interaction of bioaerosols and negative air ions in an enclosed space (chamber). An experimental study was conducted to validate the model. Mammalian reovirus bioaerosols were generated into a chamber by means of a nebulizer. A corona discharge ionization system was installed in the chamber to generate negative ions. The number concentrations of the bioaerosol in the chamber were measured using a particle counter. The concentrations of ions in the chamber were measured using an ion counter. The simulated results were in good agreement with experimental data. At a source ion generation rate of 1.9x108 ions s-1, there was no significant difference between the measured and predicted bioaerosol concentrations

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