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|Title: ||Characterization of nondiffusive transport in plasma turbulence via a novel Lagrangian method|
|Author(s): ||Mier, José Ángel|
García Gonzalo, Luis
Carreras, Benjamín A.
Newman, David E.
|Publisher: ||The American Physical Society|
|Issued date: ||17-Oct-2008|
|Citation: ||Phys Rev Lett 101, 165001 (2008)|
|Description: ||4 pages, 3 figures.-- PACS nrs.: 52.35.Ra, 05.40.Fb, 47.27.−i, 52.65.Kj.|
|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.|
|Sponsor: ||Research supported by Spanish DGES Grant No. ENE2006-15244-C03-01/FTN and DOE Office of Science Grant No. DE-FG02-04ER54741 at University of Alaska. ORNL researchers sponsored by U.S. DOE under Contract No. DE-AC05-00OR22725.|
|Publisher version: ||http://dx.doi.org/10.1103/PhysRevLett.101.165001|
|Keywords: ||[PACS] Plasma turbulence|
[PACS] Random walks and Levy flights
[PACS] Fluid dynamics: Turbulent flows
[PACS] Magnetohydrodynamic and fluid equation
|Rights: ||© The American Physical Society|
|Appears in Collections:||DF - GFP - Artículos de revistas|
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