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    Subcritical excitation of zonal flow in drift wave turbulence
    AIP Publishing ; 2022
    In:  Physics of Plasmas Vol. 29, No. 1 ( 2022-01-01)
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    In: Physics of Plasmas, AIP Publishing, Vol. 29, No. 1 ( 2022-01-01)
    Abstract: We report a subcritical excitation mechanism of zonal flow in drift wave turbulence. Employing the reductive perturbation method, it is shown that the evolution of eikonal phase of the drift wave is governed by a KdV-type equation in the (amplitude) modulational stable regime. A phase pulse train then emerges and generates potential vorticity barrier or staircases. The spatial structure of the zonal flow pattern is given analytically.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    URL: Article
    DOI: 10.1063/5.0067778
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1179425-2
    detail.hit.zdb_id: 1472746-8
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