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Reviews of topical problems


Stochastic instability and turbulent transport. Characteristic scales, increments, diffusion coefficients


National Research Centre ‘Kurchatov Institute’, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation

Stochastic instability and its associated turbulent diffusion models are reviewed with particular attention to obtaining estimates and scaling characterizing correlation effects and increments. Specific models considered include the quasilinear Kazantsev approximation, stochasticity in the system of convective cells, Kadomtsev—Pogutse scaling, percolation models, Rechester—Rosenbluth balance, etc. The primary goal is to highlight the importance of determining the functional dependence of the stochastic instability increments and transport coefficients on turbulent pulsation amplitudes and other key parameters (characteristic pulsation frequencies, drift velocities, spectral energy flow, etc.) describing systems under discussion.

Fulltext pdf (736 KB)
Fulltext is also available at DOI: 10.3367/UFNe.0185.201503b.0271
Keywords: stochastic instability, turbulent transport, diffusion coefficients, dynamical chaos, stochastic magnetic field, plasma
PACS: 05.40.−a, 47.27.−i, 47.53.+n (all)
DOI: 10.3367/UFNe.0185.201503b.0271
URL: https://ufn.ru/en/articles/2015/3/b/
000356096100002
2015PhyU...58..252B
Citation: Bakunin O G "Stochastic instability and turbulent transport. Characteristic scales, increments, diffusion coefficients" Phys. Usp. 58 252–285 (2015)
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Received: 17th, June 2014, revised: 17th, December 2014, 23rd, December 2014

Оригинал: Бакунин О Г «Стохастическая неустойчивость и турбулентный перенос. Характерные масштабы, инкременты, коэффициенты диффузии» УФН 185 271–306 (2015); DOI: 10.3367/UFNr.0185.201503b.0271

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