Memorias de investigación
Artículos en revistas:
Low-frequency model of breathing oscillations in Hall discharges
Año:2009
Áreas de investigación
  • Ingeniería naval
Datos
Descripción
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.
Internacional
Si
JCR del ISI
Si
Título de la revista
PHYSICAL REVIEW E
ISSN
1539-3755
Factor de impacto JCR
2,508
Información de impacto
Volumen
79
DOI
Número de revista
0
Desde la página
046401
Hasta la página
046401
Mes
ABRIL
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Análisis y experimentación en mecánica de fluidos y combustión
  • Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica