[GTP] IMAGe-GTP Seminar---William H. Matthaeus--This Friday at 2pm
Silvia Gentile
sgentile at ucar.edu
Wed Jan 21 14:54:19 MST 2009
MHD Relaxation, Intermittency and Reconnection: Implications for Solar
Wind Structure and Dissipation
Professor William. H. Matthaeus
Bartol Research Institute, University of Delaware
Studies of MHD turbulence show that small scale coherent structures
appear as a by-product of an intermittent cascade, driven by what appear
to be essentially ideal local relaxation processes. This view of
generation of non-Gaussian features of turbulence is consistent with
intermittency analysis. Furthermore the structures produced are shown to
have statistical properties essentially identical to statistics of
events frequently occurring in the solar wind that have usually been
identified as classical ideal MHD discontinuities. These small scale
structures lie at the interface between kinetic and fluid descriptions
of low frequency plasma behavior. The implied concentrations of electric
current density are potential sites for turbulent driven magnetic
reconnection. Recent results show how the reconnection rates are related
to the turbulence properties.
January 23, 2009
Center Green Laboratory 1, Room 2126
Lecture 2:00 pm
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