Analysis of a continuous flow parallel plate thermal diffusion cloud chamber.

Details

• Personal Author:
  Brown JT Jr. ; Schowengerdt FD
• Description:
  Transient behavior and edge effects within a continuous flow parallel plate thermal diffusion cloud chamber were analyzed in terms of thermal conduction, diffusion of water vapor, turbulence of laminar flow, and transient behavior of the conductor and diffusion process. The chamber's dimensions were 1.2 by 33.8 by 150 centimeters; carrier air and aerosol flow were directed along the length. Conduction and diffusion transients, and turbulence occurred at the entrance to the chamber. The authors conclude that it was straightforward to avoid all edge or wall effects and virtually eliminate all perturbations in the continuous flow chamber. Errors due to transients at the inlet to the chamber could be minimized if care was taken to maintain the velocity of the carrier air below the threshold determined by the geometry of the chamber. The equilibration of the carrier air would always be limited by its thermal relaxation. This limit might be partially removed by careful choice of its initial temperature or by use of a separate set of parallel thermal conditioning plates. [Description provided by NIOSH]
• Subjects:
  Laboratories Occupational Health Safety Temperature
• Keywords:
  Condensation Control-technology NIOSH-Grant NIOSH-Publication Nucleation Research-laboratories Thermal-properties
• ISSN:
  0021-8502
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  339-348
• Volume:
  10
• Issue:
  3
• NIOSHTIC Number:
  nn:00091844
• Citation:
  J Aerosol Sci 1979 Jan; 10(3):339-348
• Contact Point Address:
  Physics Colorado School of Mines Department of Engr Physics Golden, Colo 80401
• Federal Fiscal Year:
  1979
• NORA Priority Area:
  Research Tools and Approaches: Control Technology and Personal Protective Equipment
• Performing Organization:
  Colorado School of Mines, Golden, Colorado
• Peer Reviewed:
  True
• Start Date:
  19750901
• Source Full Name:
  Journal of Aerosol Science
• End Date:
  19790630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d1456b2d896cfa6dc0ae2417efe8c6cb38d357ecced57265a22dec0eba0aa735e7cb8170c354716550aa7f6efb88fc8ffddb87a4bbb335900c33eca768b11583
• Download URL:
  https://stacks.cdc.gov/view/cdc/184284/cdc_184284_DS1.pdf
• File Type:
  [PDF - 521.16 KB ]