Now showing items 1-5 of 15

  • Directional alignment and non-Gaussian statistics in solar wind turbulence

    Osman, Kareem T.; Wan, Minping; Matthaeus, William H.; Breech, Ben; Oughton, Sean (IOP Publishing, 2011)
    The magnetic and velocity field fluctuations in magnetohydrodynamic turbulence can be characterized by their directional alignment and induced electric field. These manifest as coherent spatial correlations which are ...
  • 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 ...
  • Investigation of intermittency in magnetohydrodynamics and solar wind turbulence: scale-dependent kurtosis

    Wan, Minping; Osman, Kareem T.; Matthaeus, William H.; Oughton, Sean (IOP PUBLISHING LTD, 2012)
    The behavior of scale-dependent (or filtered) kurtosis is studied in the solar wind using magnetic field measurements from the ACE and Cluster spacecraft at 1 AU. It is also analyzed numerically with high-resolution ...
  • 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 ...