Accession Number:

AD0416367

Title:

A GENERAL THEORY FOR THE FLOW OF WEAKLY IONIZED GASES,

Descriptive Note:

Corporate Author:

PRINCETON UNIV N J PLASTICS LAB

Personal Author(s):

Report Date:

1963-04-01

Pagination or Media Count:

1.0

Abstract:

A general theory is developed for the flow of a weakly ionized gas about arbitrary solid body or bodies with absorbing surfaces. The main inter est lies in the prediction of the electrical response on the body surface as a function of the pertinent properties of the flow. The theory is based on continuum formulation, and is valid when 1 the mean-free-path of the charged particles is at most the order of a Debye length and 2 the Debye length is much smaller than the thickness of the boundary layer adjacent to the body surface. The entire range of flow velocity in terms of an electric Reynolds number R is investigated. It is found that the electrical disturbances can be divided distinctly into three physically distinct but mathematically uncoupled regions, namely the outer region, the ambi-polar diffusion region and the sheath region. Closedform analytical results are obtained for the floating potential and the current-voltage characteristic. These are useful in the interpretations of Langmuir probbe data. Detailed structures of the solutions are given in terms of explicit unversal functions. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE