Signature of a universal statistical description for drift-wave plasma turbulence
arXiv:1008.3214 · doi:10.1063/1.3505824
Abstract
This Letter provides a theoretical interpretation of numerically generated probability density functions (PDFs) of intermittent plasma transport events. Specifically, nonlinear gyrokinetic simulations of ion-temperature-gradient turbulence produce time series of heat flux which exhibit manifestly non-Gaussian PDFs with enhanced tails. It is demonstrated that, after the removal of autocorrelations, the numerical PDFs can be matched with predictions from a fluid theoretical setup, based on the instanton method. This result points to a universality in the modeling of intermittent stochastic process, offering predictive capability.
4 pages, 5 figures
References in corpus (9)
- Instantons in Burgers Equation
- Instantons and Intermittency
- Instanton for the Kraichnan Passive Scalar Problem
- About the parabolic relation existing between the skewness and the kurtosis in time series of experimental data
- Zonal flow generation in ion temperature gradient mode turbulence
- Non-perturbative models of intermittency in edge turbulence
- Universal Probability Distribution Function for Bursty Transport in Plasma Turbulence
- Statistical features of edge turbulence in RFX-mod from Gas Puffing Imaging
- Analytical theory of the probability distribution function of structure formation
Cited by in corpus (12)
- A Fractional Fokker-Planck Model for Anomalous Diffusion
- Probability distribution functions for intermittent scrape-off layer plasma fluctuations
- Non-Linear Langevin and Fractional Fokker-Planck Equations for Anomalous Diffusion by Levy Stable Processes
- A theory of non-local linear drift wave transport
- Elucidating plasma dynamics in Hasegawa-Wakatani turbulence by information geometry
- Statistical analysis of Hasegawa - Wakatani turbulence
- Statistical properties of Charney-Hasegawa-Mima zonal flows
- Statistical analysis and modeling of intermittent transport events in the tokamak SOL
- Non-local gyrokinetic model of linear ion-temperature-gradient modes
- Statistical description of turbulent transport for flux driven toroidal plasmas
- A statistical analysis approach of plasma dynamics in gyrokinetic simulations of stellarator turbulence
- The probability density function tail of the Kardar-Parisi-Zhang equation in the strongly non-linear regime