Velocity shear generation of solar wind turbulence

Details Velocity shear generation of solar wind turbulence Velocity shear generation of solar wind turbulence

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9717115r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A11, p. 17,115-17,130.

Other

103

Magnetohydrodynamic Turbulence, Magnetohydrodynamic Waves, Shear Layers, Solar Wind Velocity, Kelvin-Helmholtz Instability, Kinetic Energy

Scientific paper

A two-dimensional incompressible MHD spectral code is used to show that shear-driven turbulence is a possible means for producing many observed properties of the evolution of the magnetic and velocity fluctuations in the solar wind and, in particular, the evolution of the cross helicity ('Alfvenicity') at small scales. It is shown that large-scale shear can nonlinearly produce a cascade to smaller scale fluctuations even when the linear Kelvin-Helmholtz mode is stable, and that a roughly power law inertial range is established by this process. The evolution found is similar to that seen in some other simulations of MHD turbulence.

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