Turbulence Simulation on Zonal Flow Formations in the Presence of Parallel Flows

DOI IR HANDLE Web Site 26 References
  • SASAKI Makoto
    Research Institute for Applied Mechanics, Kyushu University Research Center for Plasma Turbulence, Kyushu University Department of Physics, Warwick University
  • KASUYA Naohiro
    Research Institute for Applied Mechanics, Kyushu University Research Center for Plasma Turbulence, Kyushu University
  • KOSUGA Yusuke
    Research Institute for Applied Mechanics, Kyushu University Research Center for Plasma Turbulence, Kyushu University
  • KOBAYASHI Tatsuya
    National Institute for Fusion Science
  • YAMADA Takuma
    Research Center for Plasma Turbulence, Kyushu University Faculty of Arts and Science, Kyushu University
  • ARAKAWA Hiroyuki
    Institute of Science and Engineering, Academic Assembly, Shimane University
  • INAGAKI Shigeru
    Research Institute for Applied Mechanics, Kyushu University Research Center for Plasma Turbulence, Kyushu University
  • ITOH Kimitaka
    Research Center for Plasma Turbulence, Kyushu University National Institute for Fusion Science Institute of Science and Technology Research, Chubu University

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Abstract

<p>It is demonstrated that the zonal flow is controlled by the parallel flow in the cylindrical plasmas. A three-dimensional turbulence simulation is performed, based on the reduced fluid model. The background parallel flow is applied by introducing the time independent parallel momentum source. Changing the magnitude of the momentum source, the behavior of the zonal flow is investigated. The drift wave turbulence is affected by the parallel flow, and it shows the spatial competition between turbulence modes. The spatial competition appears/disappears abruptly, depending on the intensity of the parallel momentum source. As a consequence of the transition between the turbulence state, the radial profile of the turbulence drastically changes, which leads to the change of the turbulence force to drive the zonal flow. In this way, the parallel flow indirectly affects the zonal flow through the deformation of the turbulence.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 14 (0), 1401161-1401161, 2019-10-29

    The Japan Society of Plasma Science and Nuclear Fusion Research

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