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On the inertial range of particles under the influence of local exhaust hoods.

Authors
Flynn-MR
Source
Ann Occup Hyg 2003 Mar; 47(2):151-156
NIOSHTIC No.
20029104
Abstract
This paper presents results from numerical simulations conducted to estimate the inertial range (stopping distance) of large aerosol particles ejected away from local exhaust hoods. Potential flow theory is used to specify the air velocity along the centerline of a flanged circular hood. A high-order Gear method is used to integrate the particle equations of motion with drag coefficients in the transitional range. The results allow for a relative comparison of hood performance based on the energy cost needed to stop the particle within a specified distance. Hood size is shown to be a critical factor, while the capture velocity generated by the hood at the point of particle ejection is of secondary importance.
Keywords
Particulates; Airborne-particles; Air-contamination; Gravimetric-analysis; Aerosols; Aerosol-particles; Simulation-methods; Computer-models; Computer-software
Contact
Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7400, USA
CODEN
AOHYA3
Publication Date
20030301
Document Type
Journal Article
Email Address
mike_flynn@unc.edu
Funding Amount
719405
Funding Type
Grant
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007363
Issue of Publication
2
ISSN
0003-4878
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Annals of Occupational Hygiene
State
NC
Performing Organization
University of North Carolina Chapel Hill
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