Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Parametric analysis of the two-fluid tearing instability
Year:2009
Research Areas
  • Fluid mechanics
Information
Abstract
A two-fluid analysis of the current driven tearing instability is presented. It concentrates on the systematic investigation of the physics related to the plasma compressibility and to the contribution of the Hall term to the inductive electric field, for arbitrary values of the ion skin depth and of the magnitude of the magnetic guide field. The plasma compressibility is treated consistently for a wide range of the plasma beta that excludes only the extremely cold limit where the mode growth ratewould become sonic or supersonic. Conversely, the effects associated with the finite ion gyroradius and the equilibrium density and temperature gradients are neglected. Seven parametric regions are identified, characterized by the relative strengths of the Hall and beta parameters. Five of them are amenable to asymptotic analyses yielding analytic dispersion relations and one allows a semi-analytic treatment. The singular, multi-layer structure of the tearing mode and the conditions under which the different components of the magnetic field diffuse are shown in detail for each of those parametric regions.
International
Si
JCR
Si
Title
PLASMA PHYSICS AND CONTROLLED FUSION
ISBN
0741-3335
Impact factor JCR
2,299
Impact info
Volume
51
Journal number
0
From page
055018
To page
055018
Month
MAYO
Ranking
Participants
  • Autor: Eduardo Ahedo Galilea (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Análisis y experimentación en mecánica de fluidos y combustión
  • Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)