Low-frequency model of breathing oscillations in Hall discharges

Barral, Serge y 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.

Descripción

Título: Low-frequency model of breathing oscillations in Hall discharges
Autor/es:
  • Barral, Serge
  • Ahedo Galilea, Eduardo
Tipo de Documento: Artículo
Título de Revista/Publicación: Physical Review
Fecha: Abril 2009
Volumen: 79
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 5245
Identificador DC: http://oa.upm.es/5245/
Identificador OAI: oai:oa.upm.es:5245
Identificador DOI: 10.1103/PhysRevE.79.046401
URL Oficial: http://link.aps.org/doi/10.1103/PhysRevE.79.046401
Depositado por: Memoria Investigacion
Depositado el: 01 Dic 2010 12:13
Ultima Modificación: 20 Abr 2016 14:07
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