Computer Science
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..304p&link_type=abstract
TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 304-307 (2010).
Computer Science
1
Magnetohydrodynamics, Plasma Turbulence, Cyclotron Resonance, Magnetoacoustic Effects, Matrix Algebra, Magnetohydrodynamics, Plasma Turbulence, Plasma Heating By Radio-Frequency Fields, Icr, Icp, Helicons, Magnetoacoustic Effect, Oscillations And Resonance, Matrix Theory
Scientific paper
Kinetic evolution of the Orszag-Tang vortex is studied using collisionless hybrid simulations based on particle in cell ions and fluid electrons. In magnetohydrodynamics (MHD) this configuration leads rapidly to broadband turbulence. An earlier study [1] estimated the dissipation in the system. A comparison of MHD & hybrid simulations showed similar behavior at large scales but substantial differences at small scales. The hybrid magnetic energy spectrum shows a break at the scale where Hall term in the Ohm's law becomes important. The protons heat perpendicularly and most of the energy is dissipated through magnetic interactions. Here, the space time structure of the system is studied using frequency-wavenumber (k-ω) decomposition. No clear resonances appear, ruling out the cyclotron resonances as a likely candidate for the perpendicular heating. The only distinguishable wave modes present, which constitute a small percentage of total energy, are magnetosonic modes.
Cassak Paul A.
Matthaeus William H.
Parashar T. N.
Servidio Sergio
Shay Michael A.
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