THE CAPTURE OF SUB-MICRON AEROSOL PARTICLES BY SINGLE FINE FIBRES

Authors
  1. Wilson, L.G.
  2. Cavanagh, P.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Apparatus is described for the direct observation of the capturing of aerosol particles by single, very thin fibres. Particles of sub-micron diameters, and fibres of similar diameters were used. Other equipment described makes possible the direct assessment of deposits on individual fibres by use of an electron microscope. By these means the nature of the flow around fibres as it depends on various aerosol and fibre parameters was studied. Also measurements were made of the capturing power of various fibres, and it was found that this may vary widely for what appear to be identical conditions. These experiments indicate that current aerosol theory for the submicron region based on simplified geometrical ideas like diffusion and direct interception is unlikely to represent the facts of fibrous aerosol filtration. Factors such as surface condition of the fibres and electrostatic effects must be included before the theory can be considered realistic.
Report Number
599 —
Date of publication
01 Jan 1971
Number of Pages
16
Reprinted from
Atmospheric Environment, vol 5, 1971, p123-135
DSTKIM No
71-05351
CANDIS No
10419
Format(s):
Hardcopy;Originator's fiche received by DSIS

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