Self-organization of zonal flows and isotropic eddies in toroidal electron temperature gradient driven turbulence
Sign Up to like & getrecommendations! Published in 2020 at "Physics of Plasmas"
DOI: 10.1063/5.0015565
Abstract: Self-organization in the toroidal electron temperature gradient driven (ETG) turbulence is investigated based on a global gyrokinetic model in a weak magnetic shear configuration. Because of global profile effects, toroidal ETG modes with a higher… read more here.
Keywords: electron temperature; self organization; turbulence; zonal flows ... See more keywords
Nonlinear saturation and oscillations of collisionless zonal flows
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DOI: 10.1088/1367-2630/ab2251
Abstract: In homogeneous drift-wave turbulence, zonal flows (ZFs) can be generated via a modulational instability (MI) that either saturates monotonically or leads to oscillations of the ZF energy at the nonlinear stage. This dynamics is often… read more here.
Keywords: saturation oscillations; nonlinear saturation; zonal flows; zfs ... See more keywords
Transport hysteresis and zonal flow stimulation in magnetized plasmas
Sign Up to like & getrecommendations! Published in 2017 at "Nuclear Fusion"
DOI: 10.1088/1741-4326/aa8c4c
Abstract: Understanding transport in tokamak plasma is an important step toward viable nuclear fusion [1]. A study of zonal flows generated by trapped-electron mode (TEM) and trapped-ion mode (TIM) micro turbulence is presented. For this purpose… read more here.
Keywords: transport; zonal flows; hysteresis zonal; transport hysteresis ... See more keywords
Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration
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DOI: 10.1088/1741-4326/ac3023
Abstract: Gyrokinetic simulations of long wavelength ion temperature gradient (ITG) turbulence in the scrape-off layer (SOL) of a field-reversed configuration (FRC) find that zonal flows are nonlinearly generated and are the dominant mechanism for the nonlinear… read more here.
Keywords: zonal flows; ion; temperature gradient; ion temperature ... See more keywords
The role of zonal flows in disc gravito-turbulence
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty759
Abstract: The work presented here focuses on the role of zonal flows in the self-sustenance of gravito-turbulence in accretion discs. The numerical analysis is conducted using a bespoke pseudo-spectral code in fully compressible, non-linear conditions. The… read more here.
Keywords: role zonal; zonal flows; gravito turbulence;
Nonlinear excitation of zonal flows by turbulent energy flux.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.035205
Abstract: The nonlinear excitation of zonal flows (ZFs) generated by the ion-temperature-gradient turbulence in a tokamak plasma is investigated by using the global gyrokinetic code nlt. It is found that ZFs are initially driven by the… read more here.
Keywords: turbulent energy; energy flux; zonal flows; excitation zonal ... See more keywords