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Zero-gravity aerosol behavior

Author: Harry W Edwards; Bruce John Benedict; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.; George C. Marshall Space Flight Center.; Colorado State University.
Publisher: Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.] : [For sale by the National Technical Information Service], 1981.
Series: NASA contractor report, NASA CR-3384.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Database:WorldCat
Summary:
The feasibility and scientific benefits of a zero gravity aerosol study in an orbiting laboratory were examined. A macroscopic model was devised to deal with the simultaneous effects of diffusion and coagulation of particles in the confined aerosol. An analytical solution was found by treating the particle coagulation and diffusion constants as ensemble parameters and employing a transformation of variables. The  Read more...
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Additional Physical Format: Online version:
Edwards, Harry W. (Harry Wallace), 1939-
Zero-gravity aerosol behavior
(OCoLC)761496742
Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Harry W Edwards; Bruce John Benedict; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.; George C. Marshall Space Flight Center.; Colorado State University.
OCLC Number: 7499635
Notes: "Prepared for Marshall Space Flight Center under Contract NAS8-31673."
Jan. 1981.
Appendix I is thesis (M.S.)--Colorado State University, 1977.
Description: iii, 58 pages : illustrations ; 27 cm.
Contents: Appendix I. Theoretical behavior of a confined aerosol / submitted by Bruce John Benedict.
Series Title: NASA contractor report, NASA CR-3384.
Responsibility: Harry W. Edwards.

Abstract:

The feasibility and scientific benefits of a zero gravity aerosol study in an orbiting laboratory were examined. A macroscopic model was devised to deal with the simultaneous effects of diffusion and coagulation of particles in the confined aerosol. An analytical solution was found by treating the particle coagulation and diffusion constants as ensemble parameters and employing a transformation of variables. The solution was used to carry out simulated zero gravity aerosol decay experiments in a compact cylindrical chamber. The results demonstrate that the limitations of physical space and time imposed by the orbital situation are not prohibitive in terms of observing the history of an aerosol confined under zero gravity conditions. While the absence of convective effects would be a definite benefit for the experiment, the mathematical complexity of the problem is not greatly reduced when the gravitational term drops out of the equation. Since the model does not deal directly with the evolution of the particle size distribution, it may be desirable to develop more detailed models before undertaking an orbital experiment. (NTRL site)

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