On the inertial range of particles under the influence of local exhaust hoods.
Ann Occup Hyg 2003 Mar; 47(2):151-156
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.
Particulates; Airborne-particles; Air-contamination; Gravimetric-analysis; Aerosols; Aerosol-particles; Simulation-methods; Computer-models; Computer-software;
Author Keywords: local exhaust hoods; inertial range; stopping distance; aerosols
Michael R. Flynn, Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7400, USA
Research Tools and Approaches: Exposure Assessment Methods
Annals of Occupational Hygiene
University of North Carolina Chapel Hill