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Title: SCAVENGING IN PERSPECTIVE.

Authors:
Publication Date:
Research Org.:
Battelle-Northwest, Richland, Wash. Pacific Northwest Lab.
OSTI Identifier:
4097334
Report Number(s):
BNWL-SA-3450; CONF-700601-2
NSA Number:
NSA-25-004162
DOE Contract Number:
AT(45-1)-1830
Resource Type:
Technical Report
Resource Relation:
Other Information: From Precipitation Scavenging Meeting, Richland, Wash. UNCL. Orig. Receipt Date: 31-DEC-71
Country of Publication:
United States
Language:
English
Subject:
N22210* -Environmental & Earth Sciences-Radioactivity Monitoring & Transport-Atmosphere-Fallout Transport & Deposition; ATMOSPHERE; CONTAMINATION; DECONTAMINATION; GASES; MECHANICS; METALS; PARTICLES; PRECIPITATION; ATMOSPHERIC PRECIPITATION/contamination scavenging by, mechanisms of; CONTAMINATION/scavenging of atmospheric, mechanisms of precipitation

Citation Formats

Fuquay, J.J. SCAVENGING IN PERSPECTIVE.. United States: N. p., 1970. Web. doi:10.2172/4097334.
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Fuquay, J.J. SCAVENGING IN PERSPECTIVE.. United States. doi:10.2172/4097334.
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Fuquay, J.J. Thu . "SCAVENGING IN PERSPECTIVE.". United States. doi:10.2172/4097334. https://www.osti.gov/servlets/purl/4097334.
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@article{osti_4097334,
title = {SCAVENGING IN PERSPECTIVE.},
author = {Fuquay, J.J.},
abstractNote = {},
doi = {10.2172/4097334},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1970},
month = {Thu Jan 01 00:00:00 EST 1970}
}
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Technical Report:
View Technical Report (1.03 MB)
DOI:  10.2172/4097334
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  • Theoretical or semi-empirical relations were evaluated for several microphysical attachment mechanisms as applied to snow and ice scavenging of aerosols. It was found that inertial impaction is usually the dominant mechanism if the aerosol particle Stokes number exceeds a critical value. For smaller aerosol particles, electrostatic deposition is the dominant mechanism if the bodies are oppositely charged of mean thunderstorm charge. The remaining mechanisms investigated yield about three orders of magnitude lower scavenging kernals. A numerical model was developed and utilized to incorporate inertial, hydrodynamic, gravitational and electrostatic (coulombic) forces in order to determine trajectories of aerosol particles about snowflakesmore » and ice crystals. 135 references.« less

  • Experimental investigations of aerosol particle capture by evaporating and condensing water drops showed that capture is a function of the rate of water drop growth and aerosol particle diameter. Capture was found to be proportional to the rate of water vapor condensation and inversely proportional to aerosol particle diameter. The influence of water vapor gradient and particle size on particle capture during evaporation is insignificant. The results are explained on the basis of particle penetration through the boundary layer of a water drop. An analysis of the radioactivity of dry particulate matter in an urban atmosphere is included. (auth)

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