The impact of boundary layer separation on local exhaust design and worker exposure

Details

• Personal Author:
  Flynn MR ; George DK ; Goodman R
• Description:
  The phenomenon of boundary layer separation, an important factor in determining a worker's breathing zone concentration, was investigated. Flow visualization and tracer gas studies were conducted in a wind tunnel using a mannequin. The mannequin's breathing zone concentration was estimated using a simple conceptual model based on mass transport by vortex shedding. An empirical model which relates the measured concentration to the distance from the source to the breathing zone for the situation when the contaminant is released downstream in a uniform flow was developed. The results suggested that in situations where a worker is immersed in a uniform flow, a higher level of control may be achieved by standing to the side of the workpiece rather than with the back to the flow. The authors also suggest that caution should be displayed when extrapolating to real life situations. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Hazardous Substances Manufacturing And Industrial Facilities Occupational Health Particulate Matter Safety Smoke Ventilation
• Keywords:
  Air-contamination Airborne-particles Breathing-zone Control-technology Exhaust-ventilation Industrial-factory-workers Industrial-ventilation NIOSH-Grant NIOSH-Publication Smoke-inhalation Toxic-materials

  More +
• ISSN:
  1047-322X
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  North Carolina ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  5
• Issue:
  8
• NIOSHTIC Number:
  nn:00204827
• Citation:
  Appl Occup Environ Hyg 1990 Aug; 5(8):501-509
• Contact Point Address:
  Environmental Sciences & Engr University of North Carolina Rosenau Hall 201H Chapel Hill, NC 27514
• Federal Fiscal Year:
  1990
• NORA Priority Area:
  Research Tools and Approaches: Control Technology and Personal Protective Equipment
• Performing Organization:
  University of North Carolina Chapel Hill, Chapel Hill, North Carolina
• Peer Reviewed:
  True
• Start Date:
  19870929
• Source Full Name:
  Applied Occupational and Environmental Hygiene
• End Date:
  19890928
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3ba15fd4f3a2c2faaa0d9b5d2d6ebc3e9fd77268d516e76541495b9d4d8b600e274ad4825538ef27fb39cb5c5a22a9de9c5e70462245ec077ad19b4412339b54
• Download URL:
  https://stacks.cdc.gov/view/cdc/205730/cdc_205730_DS1.pdf
• File Type:
  [PDF - 945.44 KB ]