Coherent structure of zonal flow and onset of turbulent transport

K. Itoh; K. Hallatschek; S. I. Itoh; P. H. Diamond; S. Toda

doi:10.1063/1.1922788

Coherent structure of zonal flow and onset of turbulent transport

K. Itoh, K. Hallatschek, S. I. Itoh, P. H. Diamond, S. Toda

Division of Nuclear Fusion Dynamics

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Abstract

Excitation of the turbulence in the range of drift wave frequency and zonal flow in magnetized plasmas is analyzed. Nonlinear stabilization effect on zonal flow drive is introduced, and the steady state solution is obtained. The condition for the onset of turbulent transport is obtained and partition ratio of fluctuation energy into turbulence and zonal flows is derived. The turbulent transport coefficient, which includes the effect of zonal flow, is also obtained. Analytic result and direct numerical simulation show a good agreement.

Original language	English
Article number	062303
Pages (from-to)	1-14
Number of pages	14
Journal	Physics of Plasmas
Volume	12
Issue number	6
DOIs	https://doi.org/10.1063/1.1922788
Publication status	Published - 2005

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.1922788

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title = "Coherent structure of zonal flow and onset of turbulent transport",

abstract = "Excitation of the turbulence in the range of drift wave frequency and zonal flow in magnetized plasmas is analyzed. Nonlinear stabilization effect on zonal flow drive is introduced, and the steady state solution is obtained. The condition for the onset of turbulent transport is obtained and partition ratio of fluctuation energy into turbulence and zonal flows is derived. The turbulent transport coefficient, which includes the effect of zonal flow, is also obtained. Analytic result and direct numerical simulation show a good agreement.",

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

note = "Funding Information: This work is partly supported by the Grant-in-Aid for Specially-Promoted Research of MEXT (16002005), by the Grant-in-Aid for Scientific Research of MEXT (15360495) and by the collaboration programs of NIFS and of the Research Institute for Applied Mechanics of Kyushu University, and by Asada Science Foundation. K.H. and P.H.D. acknowledge the hospitality of Kyushu University.",

year = "2005",

doi = "10.1063/1.1922788",

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volume = "12",

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journal = "Physics of Plasmas",

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TY - JOUR

T1 - Coherent structure of zonal flow and onset of turbulent transport

AU - Itoh, K.

AU - Hallatschek, K.

AU - Itoh, S. I.

AU - Diamond, P. H.

AU - Toda, S.

N1 - Funding Information: This work is partly supported by the Grant-in-Aid for Specially-Promoted Research of MEXT (16002005), by the Grant-in-Aid for Scientific Research of MEXT (15360495) and by the collaboration programs of NIFS and of the Research Institute for Applied Mechanics of Kyushu University, and by Asada Science Foundation. K.H. and P.H.D. acknowledge the hospitality of Kyushu University.

PY - 2005

Y1 - 2005

N2 - Excitation of the turbulence in the range of drift wave frequency and zonal flow in magnetized plasmas is analyzed. Nonlinear stabilization effect on zonal flow drive is introduced, and the steady state solution is obtained. The condition for the onset of turbulent transport is obtained and partition ratio of fluctuation energy into turbulence and zonal flows is derived. The turbulent transport coefficient, which includes the effect of zonal flow, is also obtained. Analytic result and direct numerical simulation show a good agreement.

AB - Excitation of the turbulence in the range of drift wave frequency and zonal flow in magnetized plasmas is analyzed. Nonlinear stabilization effect on zonal flow drive is introduced, and the steady state solution is obtained. The condition for the onset of turbulent transport is obtained and partition ratio of fluctuation energy into turbulence and zonal flows is derived. The turbulent transport coefficient, which includes the effect of zonal flow, is also obtained. Analytic result and direct numerical simulation show a good agreement.

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DO - 10.1063/1.1922788

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JF - Physics of Plasmas

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ER -

Coherent structure of zonal flow and onset of turbulent transport

Abstract

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