| Issue |
Europhys. Lett.
Volume 51, Number 5, September I 2000
|
|
|---|---|---|
| Page(s) | 520 - 526 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2000-00369-6 | |
| Published online | 01 September 2002 | |
Non-Gaussian probability distribution functions in two-dimensional magnetohydrodynamic turbulence
1
Dipartimento di Fisica, Università degli Studi della Calabria
87036 Rende (CS), Italy and INFM, Unità di Cosenza, Italy
2
Laboratoire G. D. Cassini, CNRS UMR 6529, OCA Observatoire de Nice
B.P. 4229, 06304 Nice Cedex 04, France
Received:
1
February
2000
Accepted:
30
June
2000
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
Elsässer 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
obtained by fitting the PDFs with a given curve stemming from
the analysis of a multiplicative model by Castaing et al. (Physica D, 46 (1990) 177).
The scaling behavior of the parameter can be used to extract
information about the intermittency.
A comparison of intermittency properties in different MHD turbulent flows
is also performed.
PACS: 47.27.Jv – High-Reynolds-number turbulence / 47.27.Gs – Isotropic turbulence; homogeneous turbulence / 47.65+a – Magnetohydrodynamics and electrodynamics
© EDP Sciences, 2000
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