Calculation of Leakage and Particle Loss in Filter Cassettes

Details

• Personal Author:
  Baron, Paul A. ; Bennett JS
• Description:
  Experimental evidence of aerosol bypass leakage around the filter in plastic filter cassettes prompted an investigation using computational fluid dynamics to explain particle penetration through the leak. Axi-symmetric models of a cassette with several leak dimensions were constructed. The models predicted that submicrometer particles penetrated the leak, but that larger particles impacted on the filter surface. Experimental data from another study clearly indicated that larger solid particles were being lost from the surface of the filter during sampling. When particle bounce was invoked as an explanation for this loss of sampled solid particles, the theoretical loss from the filter in cassettes with large leaks exhibited characteristics similar to the experimental data. For small leaks, the mass loss behavior appeared to be more complex. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Environmental Monitoring Occupational Health Safety
• Keywords:
  Aerosol-sampling Air-filters Air-samplers Air-sampling-equipment Exposure-methods Workers
• ISSN:
  0278-6826
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  36
• Issue:
  5
• NIOSHTIC Number:
  nn:20022257
• Citation:
  Aerosol Sci Technol 2002 Jun; 36(5):632-641
• Contact Point Address:
  Division of Applied Research and Technology, National Institute for Occupational Safety and Health, MS R3, 4676 Columbia parkway, Cincinnati, OH 45226
• Email:
  pbaron@cdc.gov
• Federal Fiscal Year:
  2002
• NORA Priority Area:
  Research Tools and Approaches: Exposure Assessment Methods
• Peer Reviewed:
  True
• Source Full Name:
  Aerosol Science and Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:65732869c26315734a30f353c395dde4aff4a69fa9afd38ac72c5ceac83a44d02b749b82f6233f223954cee6715c73b00eca0dc38e3cca993d505cc5ac1d39de
• Download URL:
  https://stacks.cdc.gov/view/cdc/199093/cdc_199093_DS1.pdf
• File Type:
  [PDF - 686.22 KB ]