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Computational fluid dynamics investigation of particle inhalability [An article from: Journal of Aerosol Science]
Book Details
Author(s)T.R. Anthony, M.R. Flynn
PublisherElsevier
ISBN / ASINB000RR8ONG
ISBN-13978B000RR8ON8
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Aerosol Science, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
This study uses computational fluid dynamics to investigate particle aspiration at the low air velocities typical of occupational settings. A realistic representation of a human head on a simpler geometric torso was positioned facing the wind (0.2,0.4ms^-^1), and breathing was simulated using constant inhalation (1.8,4.3ms^-^1). Aspiration was simulated using laminar transport for particles 0.3-116@mm. Results from the 0.4ms^-^1 freestream and 4.3ms^-^1 inhalation rate compared well with results from the literature for smaller particles. For particles >=68@mm, simulations yielded smaller aspiration efficiencies than reported in experiments. For all low velocity conditions studied, the aspiration efficiency curve dropped well below the 50% recommended by the ACGIH in the forward-facing orientation. Additional investigation of aspiration efficiency at other orientations relative to the wind is recommended to fully investigate aspiration efficiency for large particles in occupational environments.
Description:
This study uses computational fluid dynamics to investigate particle aspiration at the low air velocities typical of occupational settings. A realistic representation of a human head on a simpler geometric torso was positioned facing the wind (0.2,0.4ms^-^1), and breathing was simulated using constant inhalation (1.8,4.3ms^-^1). Aspiration was simulated using laminar transport for particles 0.3-116@mm. Results from the 0.4ms^-^1 freestream and 4.3ms^-^1 inhalation rate compared well with results from the literature for smaller particles. For particles >=68@mm, simulations yielded smaller aspiration efficiencies than reported in experiments. For all low velocity conditions studied, the aspiration efficiency curve dropped well below the 50% recommended by the ACGIH in the forward-facing orientation. Additional investigation of aspiration efficiency at other orientations relative to the wind is recommended to fully investigate aspiration efficiency for large particles in occupational environments.
