Low-frequency model of breathing oscillations in Hall discharges

Barral, Serge and Ahedo Galilea, Eduardo (2009). Low-frequency model of breathing oscillations in Hall discharges. "Physical Review", v. 79 ; pp.. ISSN 1539-3755. https://doi.org/10.1103/PhysRevE.79.046401.

Description

Title: Low-frequency model of breathing oscillations in Hall discharges
Author/s:
  • Barral, Serge
  • Ahedo Galilea, Eduardo
Item Type: Article
Título de Revista/Publicación: Physical Review
Date: April 2009
ISSN: 1539-3755
Volume: 79
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Fundamentos Matemáticos de la Tecnología Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A paradigm for Hall discharge modeling is presented whereby only the time scale of the lowest-frequency mode is explicitly resolved. The ability of such a low-frequency model to reproduce with excellent accuracy the breathing mode is demonstrated through comparisons with a fully time-dependent numerical model. Based on this formalism, an approximate linearized model is derived which essentially constitutes a one-dimensional generalization of the classical zero-dimensional predator-prey model. The model highlights the interaction of standing plasma waves with the transport of neutral species, which involves standing and convective waves of similar magnitude. It predicts a frequency which is in close agreement with the frequency of the small perturbation modes observed in simulations. Finally, it is shown that unstable modes are in general strongly nonlinear and characterized by frequencies obeying a scaling law different from that of linear modes.

More information

Item ID: 5245
DC Identifier: http://oa.upm.es/5245/
OAI Identifier: oai:oa.upm.es:5245
DOI: 10.1103/PhysRevE.79.046401
Official URL: http://link.aps.org/doi/10.1103/PhysRevE.79.046401
Deposited by: Memoria Investigacion
Deposited on: 01 Dec 2010 12:13
Last Modified: 20 Apr 2016 14:07
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