Now showing items 1-5 of 12

  • Generation of non-Gaussian statistics and coherent structures in ideal magnetohydrodynamics

    Wan, Minping; Oughton, Sean; Servidio, Sergio; Matthaeus, William H. (American Institute of Physics, 2009)
    Spectral method simulations of ideal magnetohydrodynamics are used to investigate production of coherent small scale structures, a feature of fluid models that is usually associated with inertial range signatures of ...
  • Generation of X-points and secondary islands in 2D magnetohydrodynamic turbulence

    Wan, Minping; Matthaeus, William H.; Servidio, Sergio; Oughton, Sean (AIP Publishing, 2013)
    We study the time development of the population of X-type critical points in a two-dimensional magnetohydrodynamic model during the early stages of freely decaying turbulence. At sufficiently high magnetic Reynolds number ...
  • Local anisotropy, higher order statistics, and turbulence spectra

    Matthaeus, William H.; Servidio, Sergio; Dmitruk, Pablo; Carbone, V.; Oughton, Sean; Wan, Minping; Osman, Kareem T. (IOP PUBLISHING LTD, 2012)
    Correlation anisotropy emerges dynamically in magnetohydrodynamics (MHD), producing stronger gradients across the large-scale mean magnetic field than along it. This occurs both globally and locally, and has significant ...
  • Magnetic field line random walk in models and simulations of reduced magnetohydrodynamic turbulence

    Snodin, A. P.; Ruffolo, D.; Oughton, Sean; Servidio, Sergio; Matthaeus, William H. (IOP PUBLISHING LTD, 2013)
    The random walk of magnetic field lines is examined numerically and analytically in the context of reduced magnetohydrodynamic (RMHD) turbulence, which provides a useful description of plasmas dominated by a strong mean ...
  • Nonlinear and linear timescales near kinetic scales in solar wind turbulence

    Matthaeus, William H.; Oughton, Sean; Osman, Kareem T.; Servidio, Sergio; Wan, Minping; Gary, S.P.; Shay, M.A.; Valentini, F.; Roytershteyn, V.; Karimabadi, H.; Chapman, S.C. (American Astronomical Society, 2014-08-01)
    The application of linear kinetic treatments to plasma waves, damping, and instability requires favorable inequalities between the associated linear timescales and timescales for nonlinear (e.g., turbulence) evolution. In ...