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

Authors
Brown-JT Jr.; Schowengerdt-FD
Source
J Aerosol Sci 1979 Jan; 10(3):339-348
NIOSHTIC No.
00091844
Abstract
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.
Keywords
NIOSH-Publication; NIOSH-Grant; Control-technology; Thermal-properties; Condensation; Research-laboratories; Nucleation
Contact
Physics Colorado School of Mines Department of Engr Physics Golden, Colo 80401
CODEN
JALSB7
Publication Date
19790101
Document Type
Journal Article
Funding Amount
232996
Funding Type
Grant
Fiscal Year
1979
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-00565
Issue of Publication
3
ISSN
0021-8502
Priority Area
Control-technology
Source Name
Journal of Aerosol Science
State
CO
Performing Organization
Colorado School of Mines, Golden, Colorado
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