RT Journal Article
T1 Characterization of nondiffusive transport in plasma turbulence via a novel Lagrangian method
A1 Mier, José Ángel
A1 Sánchez, Raúl
A1 García Gonzalo, Luis
A1 Carreras, Benjamín A.
A1 Newman, D.E.
AB 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.
PB The American Physical Society
SN 0031-9007
YR 2008
FD 2008-10-17
LK https://hdl.handle.net/10016/8867
UL https://hdl.handle.net/10016/8867
LA eng
NO 4 pages, 3 figures.-- PACS nrs.: 52.35.Ra, 05.40.Fb, 47.27.−i, 52.65.Kj.
NO 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.
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RD 1 sept. 2024