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Identification of intermittent multifractal turbulence in fully kinetic simulations of magnetic reconnection
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Leonardis, Ersilia , Chapman, Sandra C., Daughton, W., Roytershteyn, V. and Karimabadi, H. (2013) Identification of intermittent multifractal turbulence in fully kinetic simulations of magnetic reconnection. Physical Review Letters, Volume 110 (Number 20). Article number 205002 . doi:10.1103/PhysRevLett.110.205002 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.110.205002
Abstract
Recent fully nonlinear, kinetic three-dimensional simulations of magnetic reconnection [W. Daughton et al., Nat. Phys. 7 539 (2011)] evolve structures and exhibit dynamics on multiple scales, in a manner reminiscent of turbulence. These simulations of reconnection are among the first to be performed at sufficient spatiotemporal resolution to allow formal quantitative analysis of statistical scaling, which we present here. We find that the magnetic field fluctuations generated by reconnection are anisotropic, have nontrivial spatial correlation, and exhibit the hallmarks of finite range fluid turbulence: they have non-Gaussian distributions, exhibit extended self-similarity in their scaling, and are spatially multifractal. Furthermore, we find that the rate at which the fields do work on the particles, J·E, is also multifractal, so that magnetic energy is converted to plasma kinetic energy in a manner that is spatially intermittent. This suggests that dissipation in this sense in collisionless reconnection on kinetic scales has an analogue in fluidlike turbulent phenomenology, in that it proceeds via multifractal structures generated by an intermittent cascade.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | Volume 110 | ||||
Number: | Number 20 | ||||
Page Range: | Article number 205002 | ||||
DOI: | 10.1103/PhysRevLett.110.205002 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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