On the normalization of transport from ITG modes
Journal article, 2016

We have analyzed the interplay of ITG turbulence and zonal flows as derived by the reductive perturbation method. Not surprisingly, the overall transport level depends strongly on the physics description of ITG modes. In particular, the fluid resonance turns out to play a dominant role for the excitation of zonal flows. This is the mechanism recently found to lead to the L-H transition and to the nonlinear Dimits upshift in transport code simulations. It is important that we have here taken the nonlinear temperature dynamics from the Reynolds stress as the convected diamagnetic flow. This has turned out to be the most relevant effect as found in transport simulations of the L-H transition, internal transport barriers, and Dimits shift.

inverse cascade

Fluid closure

zonal flows


Jan Weiland

Chalmers, Physics

Anatoly Zagorodny

Bogolyubov Institute for Theoretical Physics Nasu

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 23 10 Art no 102307- 102307

Driving Forces

Sustainable development

Subject Categories

Physical Sciences

Fusion, Plasma and Space Physics

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Basic sciences



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