Coherent structure of zonal flow and nonlinear saturation

K. Itoh, K. Hallatschek, S. Toda, H. Sanuki, S. I. Itoh

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The nonlinear structure of the zonal flow in toroidal plasma is investigated in the case that the autocorrelation times of drift waves are much shorter than the autocorrelation time of zonal flow. It is found that the turbulent drive of the zonal flow starts to decrease at a high velocity shear of the zonal flow. By this mechanism, the zonal flow evolves into a stable stationary structure in turbulent plasmas. Flow velocity and radial wavelength are obtained.

Original languageEnglish
Pages (from-to)2921-2923
Number of pages3
Journaljournal of the physical society of japan
Issue number11
Publication statusPublished - Nov 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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