Lagrangian structures and transport in turbulent magnetized plasmas

Details Lagrangian structures and transport in turbulent magnetized plasmas Lagrangian structures and transport in turbulent magnetized plasmas

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007njph....9..400p&link_type=abstract

New Journal of Physics, Volume 9, Issue 11, pp. 400 (2007).

Physics

7

Scientific paper

Using direct numerical simulations, it is established that under realistic conditions, the turbulent transport in magnetized fusion plasmas tends to be in a regime for which the cross-field dynamics of tracers can be described neither by Eulerian nor by random walk approaches. Instead, the concept of Lagrangian coherent structures turns out to be a useful tool for studying such systems. Here, networks of repelling and attracting material lines—acting as barriers for transport—become important. The latter are analogues of the stable and unstable manifolds in the static case. This opens up new possibilities for interpreting and analyzing turbulent transport in magnetized plasmas.

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