NIOSHTIC-2 Publications Search
Dispersion of Dust in a Channel by a Turbulent Gas Stream.
Hwang-CC; Singer-JM; Hartz-TN
NTIS: PB 233 492 :29 pages
The Bureau of Mines formulated a method for calculating the concentration of entrained dust from a dust deposit by a turbulent gas stream. In particular, a diffusion equation is used to calculate dust concentrations in a channel following an explosion. Dust leaving the channel walls was treated as originating from stationary or moving, and single or multiple material sources. Formulas and sample computations for various types of dust sources in circular and rectangular channels are given, based on experimental entrainment rates. The analysis predicts the dust concentration as a function of time and channel space. The results appear to agree with the physical characteristics of explosion- driven dust dispersion in a 0.6-M-diameter, 50-m-long explosion tunnel. The analysis is also applied to simultaneous and consecutive dispersion of coal and rock dust from simulated coal mine surfaces (walls, floor, roof, and ribs).
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 233 492
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division