Non-elliptic wavevector anisotropy for magnetohydrodynamic turbulence

A model of non-elliptic wavevector anisotropy is developed for the inertial-range spectrum of magnetohydrodynamic turbulence and is presented in the two-dimensional wavevector domain spanning the directions parallel and perpendicular to the mean magnetic field. The non-elliptic model is a variation...

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Bibliographic Details
Published inAnnales geophysicae (1988) Vol. 33; no. 11; pp. 1413 - 1419
Main Author Narita, Y.
Format Journal Article
LanguageEnglish
French
Published Katlenburg-Lindau Copernicus GmbH 13.11.2015
Copernicus Publications
Subjects
Anisotropy
Asymmetry
Computational fluid dynamics
Cosmic rays
Energy
Fluid flow
Frequency spectra
Frequency spectrum
Magnetic field
Magnetic fields
Magnetohydrodynamic turbulence
Magnetohydrodynamics
Solar wind
Solar wind turbulence
Spectra
Symmetry
Turbulence
Wind observation
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Summary:A model of non-elliptic wavevector anisotropy is developed for the inertial-range spectrum of magnetohydrodynamic turbulence and is presented in the two-dimensional wavevector domain spanning the directions parallel and perpendicular to the mean magnetic field. The non-elliptic model is a variation of the elliptic model with different scalings along the parallel and the perpendicular components of the wavevectors to the mean magnetic field. The non-elliptic anisotropy model reproduces the smooth transition of the power-law spectra from an index of −2 in the parallel projection with respect to the mean magnetic field to an index of −5/3 in the perpendicular projection observed in solar wind turbulence, and is as competitive as the critical balance model to explain the measured frequency spectra in the solar wind. The parameters in the non-elliptic spectrum model are compared with the solar wind observations.
ISSN:1432-0576
0992-7689
1432-0576
DOI:10.5194/angeo-33-1413-2015