Coherent structure of zonal flow and nonlinear saturation

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

doi:10.1143/JPSJ.73.2921

Coherent structure of zonal flow and nonlinear saturation

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	2921-2923
Number of pages	3
Journal	journal of the physical society of japan
Volume	73
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.73.2921
Publication status	Published - Nov 2004

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.73.2921

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title = "Coherent structure of zonal flow and nonlinear saturation",

abstract = "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.",

author = "K. Itoh and K. Hallatschek and S. Toda and H. Sanuki and Itoh, {S. I.}",

year = "2004",

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AU - Itoh, K.

AU - Hallatschek, K.

AU - Toda, S.

AU - Sanuki, H.

AU - Itoh, S. I.

PY - 2004/11

Y1 - 2004/11

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AB - 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.

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

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ER -

Coherent structure of zonal flow and nonlinear saturation

Abstract

All Science Journal Classification (ASJC) codes

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