Alfvén wave phase mixing driven by velocity shear in two dimensions

Details Alfvén wave phase mixing driven by velocity shear in two dimensions Alfvén wave phase mixing driven by velocity shear in two dimensions

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..337r&link_type=abstract

The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 337-340 (1999).

Physics

Magnetohydrodynamics And Plasmas, Solar Physics

Scientific paper

We investigate the role of velocity shears in producing strong phase mixing and damping of Alfvén waves. We show that phase mixing damps waves in regions of strong velocity shear, thus providing a possible source of heat to the solar corona and solar wind. We compare the linear solutions with direct numerical solution of the three-dimensional equations of compressible (resistive) magnetohydrodynamics (MHD). In regions far removed from the velocity shear, the simulations show that the radial evolution of the wave amplitudes follows closely WKB theory. In the shear layer, strong damping occurs in the numerical simulations, quantitatively close to that computed from the linearized analysis.

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