Zonal flow generation in parallel flow shear driven turbulence

Y. Kosuga; S. I. Itoh; K. Itoh

doi:10.1063/1.4978485

Zonal flow generation in parallel flow shear driven turbulence

Y. Kosuga, S. I. Itoh, K. Itoh

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

12 Citations (Scopus)

Abstract

Generation of zonal flow in parallel flow shear driven turbulence is discussed. Nonlinear dynamics is formulated by calculating energy transfer in the wave number space. It is shown that zonal flows can be generated (gain energy) from the primary mode which is driven by parallel flow shear. As a result, helical flow pattern can develop in turbulent plasmas. Our results imply that zonal flow can be generated in 3D parallel flow shear driven turbulence, which indicates that zonal flows are ubiquitous in turbulent plasmas, either 2D or 3D. Implications for turbulent momentum transport in laboratory and astrophysical plasmas are discussed.

Original language	English
Article number	032304
Journal	Physics of Plasmas
Volume	24
Issue number	3
DOIs	https://doi.org/10.1063/1.4978485
Publication status	Published - Mar 1 2017

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.4978485

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title = "Zonal flow generation in parallel flow shear driven turbulence",

abstract = "Generation of zonal flow in parallel flow shear driven turbulence is discussed. Nonlinear dynamics is formulated by calculating energy transfer in the wave number space. It is shown that zonal flows can be generated (gain energy) from the primary mode which is driven by parallel flow shear. As a result, helical flow pattern can develop in turbulent plasmas. Our results imply that zonal flow can be generated in 3D parallel flow shear driven turbulence, which indicates that zonal flows are ubiquitous in turbulent plasmas, either 2D or 3D. Implications for turbulent momentum transport in laboratory and astrophysical plasmas are discussed.",

author = "Y. Kosuga and Itoh, {S. I.} and K. Itoh",

note = "Funding Information: We thank Professor P. H. Diamond, Professor S. Inagaki, Dr. M. Sasaki, Dr. T. Kobayashi, and the participants in the Festival de Theorie for stimulating discussions. This work was partly supported by the Grants-in-Aid for Scientific Research of JSPS of Japan (JP15K17799, JP15H02155, and JP16H02442), Asada Science Foundation, the Collaborative Research Program of RIAM, Kyushu University, Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (26705) and Kyushu University QR Research Program (28315). Publisher Copyright: {\textcopyright} 2017 Author(s).",

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doi = "10.1063/1.4978485",

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T1 - Zonal flow generation in parallel flow shear driven turbulence

AU - Kosuga, Y.

AU - Itoh, S. I.

AU - Itoh, K.

N1 - Funding Information: We thank Professor P. H. Diamond, Professor S. Inagaki, Dr. M. Sasaki, Dr. T. Kobayashi, and the participants in the Festival de Theorie for stimulating discussions. This work was partly supported by the Grants-in-Aid for Scientific Research of JSPS of Japan (JP15K17799, JP15H02155, and JP16H02442), Asada Science Foundation, the Collaborative Research Program of RIAM, Kyushu University, Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (26705) and Kyushu University QR Research Program (28315). Publisher Copyright: © 2017 Author(s).

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Generation of zonal flow in parallel flow shear driven turbulence is discussed. Nonlinear dynamics is formulated by calculating energy transfer in the wave number space. It is shown that zonal flows can be generated (gain energy) from the primary mode which is driven by parallel flow shear. As a result, helical flow pattern can develop in turbulent plasmas. Our results imply that zonal flow can be generated in 3D parallel flow shear driven turbulence, which indicates that zonal flows are ubiquitous in turbulent plasmas, either 2D or 3D. Implications for turbulent momentum transport in laboratory and astrophysical plasmas are discussed.

AB - Generation of zonal flow in parallel flow shear driven turbulence is discussed. Nonlinear dynamics is formulated by calculating energy transfer in the wave number space. It is shown that zonal flows can be generated (gain energy) from the primary mode which is driven by parallel flow shear. As a result, helical flow pattern can develop in turbulent plasmas. Our results imply that zonal flow can be generated in 3D parallel flow shear driven turbulence, which indicates that zonal flows are ubiquitous in turbulent plasmas, either 2D or 3D. Implications for turbulent momentum transport in laboratory and astrophysical plasmas are discussed.

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DO - 10.1063/1.4978485

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Zonal flow generation in parallel flow shear driven turbulence

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