Kinetic cascade beyond magnetohydrodynamics of solar wind turbulence in two-dimensional hybrid simulations

Physics – Space Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

9 pages, 12 figures, link to publisher version: http://pop.aip.org/resource/1/phpaen/v19/i2/p022305_s1?isAuthorized=yes

Scientific paper

10.1063/1.3682960

The nature of solar wind turbulence in the dissipation range at scales much smaller than the large MHD scales remains under debate. Here a two-dimensional model based on the hybrid code abbreviated as A.I.K.E.F. is presented, which treats massive ions as particles obeying the kinetic Vlasov equation and massless electrons as a neutralizing fluid. Up to a certain wavenumber in the MHD regime, the numerical system is initialized by assuming a superposition of isotropic Alfv\'en waves with amplitudes that follow the empirically confirmed spectral law of Kolmogorov. Then turbulence develops and energy cascades into the dispersive spectral range, where also dissipative effects occur. Under typical solar wind conditions, weak turbulence develops as a superposition of normal modes in the kinetic regime. Spectral analysis in the direction parallel to the background magnetic field reveals a cascade of left-handed Alfv\'en/ion-cyclotron waves up to wave vectors where their resonant absorption sets in, as well as a continuing cascade of right-handed fast-mode and whistler waves. Perpendicular to the background field, a broad turbulent spectrum is found to be built up of fluctuations having a strong compressive component. Ion-Bernstein waves seem to be possible normal modes in this propagation direction for lower driving amplitudes. Also signatures of short-scale pressure-balanced structures (very oblique slow-mode waves) are found.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Kinetic cascade beyond magnetohydrodynamics of solar wind turbulence in two-dimensional hybrid simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetic cascade beyond magnetohydrodynamics of solar wind turbulence in two-dimensional hybrid simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetic cascade beyond magnetohydrodynamics of solar wind turbulence in two-dimensional hybrid simulations will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-471211

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.