Intermittency in plasma turbulence

L. Sorriso-Valvo, V. Carbone, P. Giuliani, P. Veltri, R. Bruno, V. Antoni, E. Martines

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Abstract

Intermittency in fluid turbulence can be evidentiated through the analysis of Probability Distribution Functions (PDF) for velocity fluctuations, which display a strong non-Gaussian behaviour at small scales. In this paper, we investigate the occurrence of intermittency in plasma turbulence by studying the departure from the Gaussian distribution of PDF for both velocity and magnetic fluctuations. We use data coming from two different experiments, namely in situ satellite observations of the inner solar wind and turbulent fluctuations in a magnetically confined fusion plasma. Moreover, we investigate also time intermittency observed in a simplified shell model which mimics 3D MHD equations. We found that the departure from a Gaussian distribution is the main characteristic of all cases. The scaling behaviour of PDFs are then investigated by using two different models built up in the past years, in order to capture the essence of intermittency in turbulence.
Original languageEnglish
Pages (from-to)1193 - 1200
Number of pages8
JournalPlanetary and Space Science
Volume49
Issue number12
DOIs
Publication statusPublished - Oct 2001
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sorriso-Valvo, L., Carbone, V., Giuliani, P., Veltri, P., Bruno, R., Antoni, V., & Martines, E. (2001). Intermittency in plasma turbulence. Planetary and Space Science, 49(12), 1193 - 1200. https://doi.org/10.1016/S0032-0633(01)00060-5