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Comparison of generalized transport and Monte-Carlo models of the escape of a minor speciesThe steady-state diffusion of a minor species through a static background species is studied using a Monte Carlo model and a generalized 16-moment transport model. The two models are in excellent agreement in the collision-dominated region and in the 'transition region'. In the 'collisionless' region the 16-moment solution contains two singularities, and physical meaning cannot be assigned to the solution in their vicinity. In all regions, agreement between the models is best for the distribution function and for the lower-order moments and is less good for higher-order moments. Moments of order higher than the heat flow and hence beyond the level of description provided by the transport model have a noticeable effect on the shape of distribution functions in the collisionless region.
Document ID
19930065426
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Demars, H. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Barakat, A. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schunk, R. W.
(Utah State Univ. Logan, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Publication Information
Publication: Journal of Atmospheric and Terrestrial Physics
Volume: 55
Issue: 12-Nov
ISSN: 0021-9169
Subject Category
Plasma Physics
Accession Number
93A49423
Funding Number(s)
CONTRACT_GRANT: NAG5-1484
Distribution Limits
Public
Copyright
Other

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