[GTP] IMAGe Seminar--Wolf-Christian Muller

[Silvia Gentile]

The Inverse Cascade of Magnetic Helicity
Wolf-Christian Müller
Max-Planck-Institut für Plasmaphysik


The inverse cascade of magnetic helicity in three-dimensional 
magnetohydrodynamic turbulence is studied by means of high-resolution 
direct numerical simulations (DNS) of decaying and small-scale-driven 
turbulent flows. In the decaying case observed self-similar 
inertial-range behavior of the magnetic helicity spectrum is 
significantly different from the results of earlier two-dimensional 
studies based on statistical closure models. The findings are explained 
by a model based on the statistical eddy-damped quasi-normal Markovian 
closure theory (EDQNM). It is shown that the inverse cascade of magnetic 
helicity is governed by the chirality of the turbulent velocity field.



Wednesday, December 3, 2008
Center Green Laboratory 1, Room 2503
Lecture 10:30am
(Refreshments served at 10:15am)
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