Publication: Characterization of nondiffusive transport in plasma turbulence via a novel Lagrangian method
Loading...
Identifiers
Publication date
2008-10-17
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
The American Physical Society
Impact
Export
Abstract
A novel method to probe and characterize the nature of the transport of passive scalars carried out by a turbulent flow is introduced. It requires the determination of two exponents which encapsulate the statistical and correlation properties of the component of interest of the Lagrangian velocities of the flow. Numerical simulations of a magnetically confined, near-critical turbulent plasma, known to exhibit superdiffusive radial transport, are used to illustrate the method. It is shown that the method can easily detect the change in the dynamics of the radial transport that takes place after adding to the simulations a (subdominant) diffusive channel of tunable strength.
Description
4 pages, 3 figures.-- PACS nrs.: 52.35.Ra, 05.40.Fb, 47.27.−i, 52.65.Kj.
Keywords
[PACS] Plasma turbulence, [PACS] Random walks and Levy flights, [PACS] Fluid dynamics: Turbulent flows, [PACS] Magnetohydrodynamic and fluid equation
Bibliographic citation
Phys Rev Lett 101, 165001 (2008)