Non-gaussian probability distribution functions in two dimensional Magnetohydrodynamic turbulence - Laboratoire Jean-Alexandre Dieudonné Accéder directement au contenu
Article Dans Une Revue EPL - Europhysics Letters Année : 2000

Non-gaussian probability distribution functions in two dimensional Magnetohydrodynamic turbulence

L. Sorriso-Valvo
V. Carbone
  • Fonction : Auteur
P. Veltri
  • Fonction : Auteur

Résumé

Intermittency in MHD turbulence has been analyzed using high resolution 2D numerical simulations. We show that the Probability Distribution Functions (PDFs) of the fluctuations of the Elsasser fields, magnetic field and velocity field depend on the scale at hand, that is they are self-affine. The departure of the PDFs from a Gaussian function can be described through the scaling behavior of a single parameter lambda_r^2 obtained by fitting the PDFs with a given curve stemming from the analysis of a multiplicative model by Castaing et al. (1990). The scaling behavior of the parameter lambda_r^2 can be used to extract informations about the intermittency. A comparison of intermittency properties in different MHD turbulent flows is also performed.

Dates et versions

hal-00119504 , version 1 (10-12-2006)

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Citer

L. Sorriso-Valvo, V. Carbone, P. Veltri, Hélène Politano, Annick Pouquet. Non-gaussian probability distribution functions in two dimensional Magnetohydrodynamic turbulence. EPL - Europhysics Letters, 2000, 51, pp.520-526. ⟨hal-00119504⟩
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