dorsal/arxiv
View SchemaIntermittency in the solar wind turbulence through probability distribution functions of fluctuations
| Authors | Luca Sorriso-Valvo, Vincenzo Carbone, Pierluigi Veltri, Giuseppe Consolini, Roberto Bruno |
|---|---|
| Categories | |
| ArXiv ID | physics/9903043 |
| URL | https://arxiv.org/abs/physics/9903043 |
| DOI | 10.1029/1999GL900270 |
| Journal | Geoph. Res. Lett., Vol. 26, No. 13, pp. 1801-1804, July 1, 1999. |
Abstract
Intermittency in fluid turbulence can be emphasized through the analysis of Probability Distribution Functions (PDF) for velocity fluctuations, which display a strong non-gaussian behavior at small scales. Castaing et al. (1990) have introduced the idea that this behavior can be represented, in the framework of a multiplicative cascade model, by a convolution of gaussians whose variances is distributed according to a log-normal distribution. In this letter we have tried to test this conjecture on the MHD solar wind turbulence by performing a fit of the PDF of the bulk speed and magnetic field intensity fluctuations calculated in the solar wind, with the model. This fit allows us to calculate a parameter depending on the scale, which represents the width of the log-normal distribution of the variances of the gaussians. The physical implications of the obtained values of the parameter as well as of its scaling law are finally discussed
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"abstract": "Intermittency in fluid turbulence can be emphasized through the analysis of\nProbability Distribution Functions (PDF) for velocity fluctuations, which\ndisplay a strong non-gaussian behavior at small scales. Castaing et al. (1990)\nhave introduced the idea that this behavior can be represented, in the\nframework of a multiplicative cascade model, by a convolution of gaussians\nwhose variances is distributed according to a log-normal distribution. In this\nletter we have tried to test this conjecture on the MHD solar wind turbulence\nby performing a fit of the PDF of the bulk speed and magnetic field intensity\nfluctuations calculated in the solar wind, with the model. This fit allows us\nto calculate a parameter depending on the scale, which represents the width of\nthe log-normal distribution of the variances of the gaussians. The physical\nimplications of the obtained values of the parameter as well as of its scaling\nlaw are finally discussed",
"arxiv_id": "physics/9903043",
"authors": [
"Luca Sorriso-Valvo",
"Vincenzo Carbone",
"Pierluigi Veltri",
"Giuseppe Consolini",
"Roberto Bruno"
],
"categories": [
"physics.plasm-ph",
"astro-ph",
"chao-dyn",
"nlin.CD",
"physics.data-an"
],
"doi": "10.1029/1999GL900270",
"journal_ref": "Geoph. Res. Lett., Vol. 26, No. 13, pp. 1801-1804, July 1, 1999.",
"title": "Intermittency in the solar wind turbulence through probability distribution functions of fluctuations",
"url": "https://arxiv.org/abs/physics/9903043"
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