Dynamical evolution of coherent structures in intermittent two-dimensional MHD turbulence

Author

Wu, C.C. ; Chang, Tom

Author_Institution

Dept. of Phys. & Astron., California Univ., Los Angeles, CA, USA

Volume

28

Issue

6

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1938

Lastpage

1943

Abstract

Recent satellite observations indicate that the Earth´s magnetotail is generally in a state of intermittent turbulence. A model of sporadic localized merging of coherent structures has recently been proposed by Chang to describe the dynamics of the Earth´s magnetotail. The authors report the results of MHD simulations regarding the development and merging of two dimensional coherent structures. With a magnetic shear, such coherent structures are generated in alignment with the imposed current sheet. The calculated fluctuation spectra suggest long-ranged correlations with power-law characteristics

Keywords

magnetosphere; plasma magnetohydrodynamics; plasma turbulence; MHD simulation; MHD turbulence; coherent structure; dynamical evolution; dynamics; fluctuation spectra; imposed current sheet; intermittent turbulence; intermittent two-dimensional turbulence; long-ranged correlation; magnetic shear; magnetic tail; magnetosphere; magnetotail; plasma turbulence; power-law characteristics; sporadic localized merging; Computational modeling; Computer simulation; Equations; Fluctuations; Magnetic fields; Magnetohydrodynamics; Magnetosphere; Merging; Plasma density; Space technology;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.902222

Filename

902222