Browsing by Author "Osman, Kareem T."

Now showing items 1-5 of 5

  • 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 ...
  • 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 (The Royal Society, 2015)
    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. ...
  • 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 ...
  • 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 ...