Now showing items 6-10 of 16

  • 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 ...
  • On the accuracy of simulations of turbulence

    Wan, Minping; Oughton, Sean; Matthaeus, William H. (American Institute of Physics, 2010)
    The widely recognized issue of adequate spatial resolution in numerical simulations of turbulence is studied in the context of two-dimensional magnetohydrodynamics. The familiar criterion that the dissipation scale should ...
  • On the origin of anisotropy in magnetohydrodynamic turbulence: the role of higher-order correlations

    Oughton, Sean; Wan, Minping; Servidio, Sergio; Matthaeus, William H. (IOP Science, 2013)
    Evolution of magnetohydrodynamic turbulence is often discussed in terms of second-order statistics like the energy spectra, but consideration of the structure of the von K´arm´an–Howarth hierarchy for MHD indicates that ...
  • Solar wind fluctuations and the von Kármán–Howarth equations: The role of fourth-order correlations

    Oughton, Sean; Wan, Minping; Matthaeus, William H.; Servidio, Sergio (American Institute of Physics, 2013)
    The von Kármán-Howarth (vKH) hierarchy of equations relate the second-order correlations of the turbulent fluctuations to the third-order ones, the third-order to the fourth-order, and so on. We recently demonstrated [1] ...