Far wake structure in rarefied plasma flows past charged bodies

Sanmartín Losada, Juan Ramón and Lam, S.H. (1971). Far wake structure in rarefied plasma flows past charged bodies. "Physics of Fluids", v. 14 ; pp. 62-71. ISSN 0031-9171.

Description

Title: Far wake structure in rarefied plasma flows past charged bodies
Author/s:
  • Sanmartín Losada, Juan Ramón
  • Lam, S.H.
Item Type: Article
Título de Revista/Publicación: Physics of Fluids
Date: 1971
Volume: 14
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The asymptotic structure of the far-wake behind a charged body in a rarefied plasma flow is investigated under the assumption of small ion-to-electron temperature ratio and of flow speed hypersonic with respect to the ions but not with respect to the electrons. It is found that waves are excited even if the flow is subacoustic (flow velocity less than the ion-acoustic speed). For both superacoustic and subacoustic velocities a steep wave front develops separating the weakly perturbed, quasineutral plasma ahead, from the region behind where ion waves appear. Near the axis a trailing front develops;the region between this and the axis is quasineutral for superacoustic speeds. The decay laws in all of these regions, the self-similar structure of the fronts and the general character of the waves are determined.The damping of the waves and special flow detail for bodies large and small compared with the Debye length are discussed. A nonlinear analysis of the leading wave front in superacoustic flow is carried out. A hyperacoustic equivalence principle is presented.

More information

Item ID: 21309
DC Identifier: http://oa.upm.es/21309/
OAI Identifier: oai:oa.upm.es:21309
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 10 Oct 2013 12:28
Last Modified: 24 Oct 2016 07:55
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