Magnetic shear effect on zonal flow generation in ion-temperature-gradient mode turbulence | Zendy

Lu He-Lin | Zendy; Chen Zhong-Yong | Zendy; Yuexun Li | Zendy; Yang Kai | Zendy

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Magnetic shear effect on zonal flow generation in ion-temperature-gradient mode turbulence

Author(s) -

Lu He-Lin,

Chen Zhong-Yong,

Yuexun Li,

Yang Kai

Publication year - 2011

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.60.085202

Subject(s) - decoupling (probability) , physics , turbulence , modulational instability , mechanics , shear flow , zonal flow (plasma) , nonlinear system , shear (geology) , instability , temperature gradient , wave turbulence , classical mechanics , materials science , plasma , meteorology , quantum mechanics , control engineering , engineering , composite material , tokamak

By decoupling the nonlinear fluid equations of ion-temperature-gradient (ITG) mode, the zonal flow-drift wave nonlinear dynamical equation including magnetic shear is derived. The role of magnetic shear for zonal flow generation by ITG mode turbulence is studied using a four-wave interaction model of modulational instability. Finally we can draw the conclusion that within a smaller range of k//, as |k//| increases, the growth rate of zonal flow is also increased.

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