TITLE

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

AUTHOR(S)
Wan, M.; Oughton, S.; Servidio, S.; Matthaeus, W. H.
PUB. DATE
August 2009
SOURCE
Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p080703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 nonuniform dissipation, and the associated emergence of non-Gaussian statistics. The near-identical growth of non-Gaussianity in ideal and nonideal cases suggests that generation of coherent structures and breaking of self-similarity are essentially ideal processes. This has important implications for understanding the origin of intermittency in turbulence.
ACCESSION #
43975194

 

Related Articles

  • Theory and simulations of principle of minimum dissipation rate. Shaikh, Dastgeer; Dasgupta, B.; Zank, G. P.; Hu, Q. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p012306 

    We perform a self-consistent, time-dependent numerical simulations of dissipative turbulent plasmas at a higher Lundquist number, typically up to O(106), using full three-dimensional compressible magnetohydrodynamics code with a numerical resolution of 1283. Our simulations follow the time...

  • Classical MHD shocks: theory and numerical simulation. Pogorelov, Nikolai V. // AIP Conference Proceedings;2005, Vol. 781 Issue 1, p42 

    Recent results are surveyed in the investigation of the behavior of shocks in ideal magnetohydrodynamics (MHD) and corresponding structures in dissipative/resistive plasma flows. In contrast to evolutionary shocks, a solution of the problem of the nonevolutionary shock interaction with small...

  • Models of radiation yield from wire array implosion at 1 MA Zebra generator. Esaulov, Andrey // Physics of Plasmas;Apr2006, Vol. 13 Issue 4, p042506 

    The snowplow and thin shell models that have the analytical solutions in zero dimensions are linked with the ideal magnetohydrodynamic (MHD) and radiation MHD codes to calculate the radiation yield from the imploding wire array loads at 1 MA Zebra generator. Radiation MHD simulations show that...

  • A simple, analytical model of collisionless magnetic reconnection in a pair plasma. Hesse, Michael; Zenitani, Seiji; Kuznetsova, Masha; Klimas, Alex // Physics of Plasmas;Oct2009, Vol. 16 Issue 10, p102106 

    A set of conservation equations is utilized to derive balance equations in the reconnection diffusion region of a symmetric pair plasma. The reconnection electric field is assumed to have the function to maintain the current density in the diffusion region and to impart thermal energy to the...

  • Response to “Comment on ‘Exact solutions of cylindrical and spherical dust ion acoustic waves’” [Phys. Plasmas 12, 054701 (2005)]. Sahu, Biswajit; Roychoudhury, Rajkumar // Physics of Plasmas;May2005, Vol. 12 Issue 5, p054702 

    It is shown that the similarity solution of cylindrical Korteweg–de Vries equation given by Tian and Gao in their Comment on our paper can be obtained by the group analysis method using the same generators given in the paper by Sahu and Roychoudhury.

  • Numerical simulation of a cascaded arc source with different Ar–H2 mixtures of nonlocal thermal equilibrium plasmas. Ahmad, Zahoor // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p083503 

    Cascaded arc of Pilot-PSI is modeled using numerical simulation code PLASIMO [G. M. Janssen, Ph.D. thesis, Eindhoven University of Technology (2000), http://plasimo.phys.tue.nl]. Pilot-PSI is a linear device used to produce a high density plasma column for the study of plasma surface interaction...

  • Flow of a two-fluid plasma carrying a pulsed current in a steady-state magnetic field. Ostrovskaya, G. V. // Technical Physics;Nov2008, Vol. 53 Issue 11, p1391 

    The problem of the motion of plasma carrying a pulsed current in a steady-state magnetic field is solved in terms of two-fluid magnetohydrodynamics. The initial directions of the force and current vectors are determined, and the relations that determine their time evolution are obtained. The...

  • Classification and stability of plasma motion in periodic linearly polarized relativistic waves. Lehmann, G.; Spatschek, K. H. // Physics of Plasmas;Jul2010, Vol. 17 Issue 7, p072102 

    Based on a relativistic fluid-Maxwell model, laser-induced plasma dynamics is investigated for relativistic periodic waves. Within a one-dimensional (1D) description, the Akhiezer–Polovin model is applied to the existence of periodic, nonlinearly coupled electromagnetic and electrostatic...

  • Damping of magnetohydrodynamic disturbances in multi-ion-species plasmas. Toida, Mieko; Yoshiya, Takashi; Ohsawa, Yukiharu // Physics of Plasmas;Apr2006, Vol. 13 Issue 4, p042302 

    The evolution of macroscopic magnetohydrodynamic disturbances across a magnetic field is studied, with particular attention to the effect of multiple ion species. Analyses are carried out on disturbances where the initial magnetic profiles are sinusoidal. Both the theory and electromagnetic...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics