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      Intermittency, nonlinear dynamics and dissipation in the solar wind and astrophysical plasmas

      Matthaeus, William H.; Wan, Minping; Servidio, Sergio; Greco, A.; Osman, Kareem T.; Oughton, Sean; Dmitruk, Pablo
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      MattEA15-intermit-PhilTransA.pdf
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      DOI
       10.1098/rsta.2014.0154
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      Matthaeus, W. H., Wan, M., Servidio, S., Greco, A., Osman, K. T., Oughton, S., & Dmitruk, P. (2015). Intermittency, nonlinear dynamics and dissipation in the solar wind and astrophysical plasmas. Philosophical Transactions of The Royal Society A: Mathematical Physical And Engineering Sciences, 373(2041). https://doi.org/10.1098/rsta.2014.0154
      Permanent Research Commons link: https://hdl.handle.net/10289/11342
      Abstract
      An overview is given of important properties of spatial and temporal intermittency, including evidence of its appearance in fluids, magnetofluids and plasmas, and its implications for understanding of heliospheric plasmas. Spatial intermittency is generally associated with formation of sharp gradients and coherent structures. The basic physics of structure generation is ideal, but when dissipation is present it is usually concentrated in regions of strong gradients. This essential feature of spatial intermittency in fluids has been shown recently to carry over to the realm of kinetic plasma, where the dissipation function is not known from first principles. Spatial structures produced in intermittent plasma influence dissipation, heating, and transport and acceleration of charged particles. Temporal intermittency can give rise to very long time correlations or a delayed approach to steady-state conditions, and has been associated with inverse cascade or quasi-inverse cascade systems, with possible implications for heliospheric prediction.
      Date
      2015
      Type
      Journal Article
      Publisher
      The Royal Society
      Rights
      © 2015 The Author(s) Published by the Royal Society. All rights reserved.
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      • Computing and Mathematical Sciences Papers [1455]
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