Solitary zonal structures in subcritical drift waves: a minimum model

Zhou, Yao; Zhu, Hongxuan; Dodin, I. Y.

doi:10.1088/1361-6587/ab78f3

Title: Solitary zonal structures in subcritical drift waves: a minimum model

Abstract

Solitary zonal structures have recently been identified in gyrokinetic simulations of subcritical drift-wave (DW) turbulence with background shear flows. However, the nature of these structures has not been fully understood yet. Here, we show that similar structures can be obtained within a reduced model, which complements the modified Hasegawa–Mima equation with a generic primary instability and a background shear flow. We also find that these structures can be qualitatively reproduced in the modified Hasegawa–Wakatani equation, which subsumes the reduced model as a limit. In particular, we illustrate that in both cases, the solitary zonal structures approximately satisfy the same 'equation of state', which is a local relation connecting the DW envelope with the zonal-flow velocity. Due to this generality, our reduced model can be considered as a minimum model for solitary zonal structures in subcritical DWs.

Authors:

^[1];

^[2];

^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences

Publication Date:: 2020-03-10

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1606350

Grant/Contract Number:: AC02-09CH11466

Resource Type:: Accepted Manuscript

Journal Name:: Plasma Physics and Controlled Fusion

Additional Journal Information:: Journal Volume: 62; Journal Issue: 4; Journal ID: ISSN 0741-3335

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Zhou, Yao, Zhu, Hongxuan, and Dodin, I. Y. Solitary zonal structures in subcritical drift waves: a minimum model.  United States: N. p., 2020. 
Web.  doi:10.1088/1361-6587/ab78f3.

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                    Zhou, Yao, Zhu, Hongxuan, & Dodin, I. Y. Solitary zonal structures in subcritical drift waves: a minimum model.  United States.  https://doi.org/10.1088/1361-6587/ab78f3

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                    Zhou, Yao, Zhu, Hongxuan, and Dodin, I. Y. Tue .  
"Solitary zonal structures in subcritical drift waves: a minimum model".  United States.  https://doi.org/10.1088/1361-6587/ab78f3.  https://www.osti.gov/servlets/purl/1606350.

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@article{osti_1606350,

  title        = {Solitary zonal structures in subcritical drift waves: a minimum model},

  author       = {Zhou, Yao and Zhu, Hongxuan and Dodin, I. Y.},

  abstractNote = {Solitary zonal structures have recently been identified in gyrokinetic simulations of subcritical drift-wave (DW) turbulence with background shear flows. However, the nature of these structures has not been fully understood yet. Here, we show that similar structures can be obtained within a reduced model, which complements the modified Hasegawa–Mima equation with a generic primary instability and a background shear flow. We also find that these structures can be qualitatively reproduced in the modified Hasegawa–Wakatani equation, which subsumes the reduced model as a limit. In particular, we illustrate that in both cases, the solitary zonal structures approximately satisfy the same 'equation of state', which is a local relation connecting the DW envelope with the zonal-flow velocity. Due to this generality, our reduced model can be considered as a minimum model for solitary zonal structures in subcritical DWs.},

  doi          = {10.1088/1361-6587/ab78f3},

  journal      = {Plasma Physics and Controlled Fusion},

  number       = 4,

  volume       = 62,

  place        = {United States},

  year         = {2020},

  month        = {3}

}

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Title: Solitary zonal structures in subcritical drift waves: a minimum model

Abstract

Citation Formats

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Shell models and the possibility of application to fusion plasmas journal, March 2010

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Statistical Simulation of the Magnetorotational Dynamo
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Pseudo-three-dimensional turbulence in magnetized nonuniform plasma
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Generalized action invariants for drift waves-zonal flow systems
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Transition to subcritical turbulence in a tokamak plasma
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On the Quantum Correction For Thermodynamic Equilibrium
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The modulational instability in the extended Hasegawa-Mima equation with a finite Larmor radius
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Streamer and zonal flow generation from envelope modulations in drift wave turbulence
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Gyrofluid turbulence models with kinetic effects
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Streamer saturation: a dynamical systems approach
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On non-local energy transfer via zonal flow in the Dimits shift
journal, October 2017

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Radial Spreading of Drift-Wave–Zonal-Flow Turbulence via Soliton Formation
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