Wave-kinetic approach to zonal-flow dynamics: recent advances

Zhu, Hongxuan; Dodin, I Y

doi:10.11578/1814951

Title: Wave-kinetic approach to zonal-flow dynamics: recent advances

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Abstract

Basic physics of drift-wave turbulence and zonal flows has long been studied within the framework of wave-kinetic theory. Recently, this framework has been re-examined from first principles, which has led to more accurate yet still tractable "improved" wave-kinetic equations. In particular, these equations reveal an important effect of the zonal-flow "curvature" (the second radial derivative of the flow velocity) on dynamics and stability of drift waves and zonal flows. We overview these recent findings and present a consolidated high-level picture of (mostly quasilinear) zonal-flow physics within reduced models of drift-wave turbulence.

Authors:

Zhu, Hongxuan; Dodin, I Y

Princeton University (PPPL)

Publication Date:: Thu Feb 18 23:00:00 EST 2021

DOE Contract Number:: AC02-09CH11466

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

Sponsoring Org.:: USDOE Office of Science (SC)

Subject:: fusion plasmas; plasma instabilities; plasma waves

OSTI Identifier:: 1814951

DOI:: https://doi.org/10.11578/1814951

Citation Formats


                    Zhu, Hongxuan, and Dodin, I Y. Wave-kinetic approach to zonal-flow dynamics: recent advances.  United States: N. p., 2021. 
        Web.  doi:10.11578/1814951.

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                    Zhu, Hongxuan, & Dodin, I Y. Wave-kinetic approach to zonal-flow dynamics: recent advances.  United States.  doi:https://doi.org/10.11578/1814951

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                    Zhu, Hongxuan, and Dodin, I Y. 2021.  
"Wave-kinetic approach to zonal-flow dynamics: recent advances".  United States.  doi:https://doi.org/10.11578/1814951.  https://www.osti.gov/servlets/purl/1814951. Pub date:Thu Feb 18 23:00:00 EST 2021

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@article{osti_1814951,

  title        = {Wave-kinetic approach to zonal-flow dynamics: recent advances},

  author       = {Zhu, Hongxuan and Dodin, I Y},

  abstractNote = {Basic physics of drift-wave turbulence and zonal flows has long been studied within the framework of wave-kinetic theory. Recently, this framework has been re-examined from first principles, which has led to more accurate yet still tractable "improved" wave-kinetic equations. In particular, these equations reveal an important effect of the zonal-flow "curvature" (the second radial derivative of the flow velocity) on dynamics and stability of drift waves and zonal flows. We overview these recent findings and present a consolidated high-level picture of (mostly quasilinear) zonal-flow physics within reduced models of drift-wave turbulence.},

  doi          = {10.11578/1814951},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Feb 18 23:00:00 EST 2021},

  month        = {Thu Feb 18 23:00:00 EST 2021}

}

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DOI: https://doi.org/10.11578/1814951

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Wave-kinetic approach to zonal-flow dynamics: Recent advances

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The basic physics of drift-wave turbulence and zonal flows has long been studied within the framework of the wave-kinetic theory. Recently, this framework has been reexamined from first principles, which has led to more accurate yet still tractable “improved” wave-kinetic equations. In particular, these equations reveal an important effect of the zonal-flow “curvature” (the second radial derivative of the flow velocity) on the dynamics and stability of drift waves and zonal flows. Here, we overview these recent findings and present a consolidated high-level picture of (mostly quasilinear) zonal-flow physics within reduced models of drift-wave turbulence.
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