REVISITING A CLASSIC: THE PARKER-MOFFATT PROBLEM

ABSTRACT The interaction of two colliding Alfvén wave packets is described here by means of magnetohydrodynamics (MHD) and hybrid kinetic numerical simulations. The MHD evolution revisits the theoretical insights described by Moffatt, Parker, Kraichnan, Chandrasekhar, and Elsässer in which the oppos...

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Bibliographic Details
Published in:The Astrophysical journal 2017-01, Vol.834 (2), p.166
Main Authors: Pezzi, O., Parashar, T. N., Servidio, S., Valentini, F., Vásconez, C. L., Yang, Y., Malara, F., Matthaeus, W. H., Veltri, P.
Format: Article
Language:English
Subjects:
ALFVEN WAVES
AMPLITUDES
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Computational fluid dynamics
Computer simulation
COMPUTERIZED SIMULATION
KINETICS
Magnetohydrodynamic turbulence
MAGNETOHYDRODYNAMICS
magnetohydrodynamics (MHD)
Numerical simulations
PLASMA
plasmas
SOLAR WIND
TURBULENCE
WAVE PACKETS
Wave propagation
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Summary:ABSTRACT The interaction of two colliding Alfvén wave packets is described here by means of magnetohydrodynamics (MHD) and hybrid kinetic numerical simulations. The MHD evolution revisits the theoretical insights described by Moffatt, Parker, Kraichnan, Chandrasekhar, and Elsässer in which the oppositely propagating large-amplitude wave packets interact for a finite time, initiating turbulence. However, the extension to include compressive and kinetic effects, while maintaining the gross characteristics of the simpler classic formulation, also reveals intriguing features that go beyond the pure MHD treatment.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/834/2/166