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DC Field | Value | Language |
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dc.contributor.author | Sridhar, S. | - |
dc.date.accessioned | 2010-07-20T09:39:36Z | - |
dc.date.available | 2010-07-20T09:39:36Z | - |
dc.date.issued | 2009-12-28 | - |
dc.identifier.citation | Astronomische Nachrichten, 2010, Vol.331, p93 | en |
dc.identifier.issn | 1521-3994 (Online) | - |
dc.identifier.issn | 0004-6337 | - |
dc.identifier.uri | http://hdl.handle.net/2289/3905 | - |
dc.description | Restricted Access. | en |
dc.description.abstract | I present a review of incompressible magnetohydrodynamic (MHD) turbulence in a strongly magnetised plasma. The approach is phenomenological even where a more rigorous theory is available, so that a reader armed with paper, pencil and some determination may be able to work through most of the physics. The focus is on the inertial-range spectra for very large (fluid and magnetic) Reynolds numbers. These theories of the inertial-range are built on two important facts: (i) Kraichnan's insight that the turbulent cascades are a result of nonlinear interactions between oppositely directed wavepackets of Elsasser fields; (ii) these oppositely directed wavepackets do not exchange energy, but contribute only to changing each other's spatial structures. I begin with a description and critique of the Iroshnikov-Kraichnan theory, and explore the fundamental departures necessitated by the anisotropic nature of the turbulence. Derivations of the inertial-range spectra of four regimes of MHD turbulence - the balanced weak, balanced strong, imbalanced weak and the imbalanced strong cascades - are then presented. The need for studying the spectra of imbalanced turbulence when the waves on the outer scale have a short correlation time is briefly discussed | en |
dc.language.iso | en | en |
dc.publisher | WILEY-VCH Verlag GmbH & Co | en |
dc.relation.uri | http://adsabs.harvard.edu/abs//2009arXiv0911.2581S | en |
dc.relation.uri | http://arxiv.org/abs/0911.2581 | en |
dc.relation.uri | http://dx.doi.org/10.1002/asna.200911306 | en |
dc.rights | 2010 WILEY-VCH Verlag GmbH & Co. | en |
dc.subject | magnetohydrodynamics (MHD) | en |
dc.subject | turbulence | en |
dc.title | Magnetohydrodynamic turbulence in a strongly magnetised plasma | en |
dc.type | Article | en |
dc.additional | An open-access version is available at arXiv.org (one of the alternative locations) | en |
Appears in Collections: | Research Papers (A&A) |
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2010_Astronomische_N_V331_p93.pdf Restricted Access | Restricted Access | 148.3 kB | Adobe PDF | View/Open Request a copy |
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