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      Reduced magnetohydrodynamics and parallel spectral transfer

      Oughton, Sean; Dmitruk, Pablo; Matthaeus, William H.
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      Oughton -spectral transfer.doc.pdf
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      DOI
       10.1063/1.1705652
      Link
       link.aip.org
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      Oughton, S., Dmitruk, P. & Matthaeus, W. H. (2004). Reduced magnetohydrodynamics and parallel spectral transfer. Physics of Plasmas, 11, 2214 .
      Permanent Research Commons link: https://hdl.handle.net/10289/1268
      Abstract
      The self-consistency of the reduced magnetohydrodynamics (RMHD) model is explored by examining whether (parallel) spectral transfer might invalidate the assumptions employed in deriving it. Using direct numerical simulations we find that transfer of energy to structures with high parallel wavenumber is in fact limited by ongoing perpendicular transfer. Thus, the dynamics associated with RMHD models remains consistent with the underlying assumptions of RMHD. In particular, in well-resolved simulations it is neither necessary nor correct to introduce additional dissipation terms that (artificially) damp spectral transfer parallel to the mean magnetic field B0.
      Date
      2004-04-16
      Type
      Journal Article
      Publisher
      American Institute of Physics (API)
      Rights
      Copyright 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in the journal Physics of Plasmas and may be found at http://jmp.aip.org/jmp/top.jsp
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