The effect of sheared diamagnetic flow on turbulent structures generated by the Charney–Hasegawa–Mima equation

Botha, Gert, Haines, Malcolm and Hastie, Jim (1999) The effect of sheared diamagnetic flow on turbulent structures generated by the Charney–Hasegawa–Mima equation. Physics of Plasmas, 6 (10). pp. 3838-3852. ISSN 1070-664X

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Official URL: http://dx.doi.org/10.1063/1.873648

Abstract

The generation of electrostatic drift wave turbulence is modelled by the Charney–Hasegawa–Mima equation. The equilibrium density gradient n0=n0(x) is chosen so that dn0 /dx is nonzero and spatially variable (i.e., v*e is sheared). It is shown that this sheared diamagnetic flow leads to localized turbulence which is concentrated at max(grad n0), with a large dv*e/dx inhibiting the spread of the turbulence in the x direction. Coherent structures form which propagate with the local v*e in the y direction. Movement in the x direction is accompanied by a change in their amplitudes. When the numerical code is initialized with a single wave, the plasma behaviour is dominated by the initial mode and its harmonics.

Item Type: Article
Additional Information: The following article appeared in Phys. Plasmas 6, 3838 (1999) and may be found at http://dx.doi.org/10.1063/1.873648.
Subjects: F300 Physics
G900 Others in Mathematical and Computing Sciences
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Gert Botha
Date Deposited: 14 Jan 2013 09:55
Last Modified: 13 May 2017 17:02
URI: http://nrl.northumbria.ac.uk/id/eprint/10996

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