What question did this study set out to answer?

Determine the impact of turbulence-driven zonal flows on turbulent transport and clarify why global and local plasma simulations exhibit conflicting flow dynamics.

September 18, 1998Science

Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations

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Determine the impact of turbulence-driven zonal flows on turbulent transport and clarify why global and local plasma simulations exhibit conflicting flow dynamics.
Executed 3D gyrokinetic simulations of microturbulence in magnetically confined toroidal plasmas using massively parallel supercomputers.
Modeled nonlinear global instabilities driven by ion temperature gradients under linear flow damping.
Observed the development of an asymptotic residual flow under linear flow damping that matches theoretical analytic calculations.
Demonstrated that fluctuating zonal flows generated by turbulence substantially suppress turbulent transport.
Identified plasma profile variations as the source of differences in flow dynamics between global and local simulations.

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Implication

Computational simulation study reveals that turbulence-driven zonal flows reduce turbulent transport in toroidal plasmas, indicating profile variations account for differing flow dynamics.

Cite This Study

Lin et al. (1998) studied this question.

synapsesocial.com/papers/6a17d355cf49e78c48b47ec9 https://doi.org/10.1126/science.281.5384.1835

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Implication

Computational simulation study reveals that turbulence-driven zonal flows reduce turbulent transport in toroidal plasmas, indicating profile variations account for differing flow dynamics.

Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations

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Discussion

Implication

Cite This Study

Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations

Key Points

Discussion

Implication

Cite This Study

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