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Evaluation of Facial Features on Particle Inhalation

Computational fluid dynamics (CFD) and numerical investigations of particle inhalability and contaminant exposure have used simple geometrical surrogates for a breathing human form, but the effect of eliminating facial features has not been investigated. In this work, the velocity field and particle...

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Bibliographic Details
Published in:The Annals of occupational hygiene 2005-03, Vol.49 (2), p.179-193
Main Authors: ANTHONY, T. RENÉE, FLYNN, MICHAEL R., EISNER, ALFRED
Format: Article
Language:English
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Summary:Computational fluid dynamics (CFD) and numerical investigations of particle inhalability and contaminant exposure have used simple geometrical surrogates for a breathing human form, but the effect of eliminating facial features has not been investigated. In this work, the velocity field and particle aspiration associated with two differently shaped mannequins were investigated to determine if an elliptical form was sufficient to represent the complexity of fluid flow associated with an inhaling human. Laser Doppler anemometry was used to measure velocity, and both optical sizing and gravimetric analysis were used to measure particle aspiration from an aerosol source. All tests were performed with continuous inhalation through the mouth, with the mannequin facing the 0.3 m s−1 freestream. Although limitations in the laser Doppler optics prevented velocity measurements at distances
ISSN:0003-4878
1475-3162
1475-3162
DOI:10.1093/annhyg/meh082