Resonance enhanced turbulent transport

Andrew P.L. Newton; Eun Jin Kim

doi:10.1063/1.2821246

Resonance enhanced turbulent transport

Andrew P.L. Newton, Eun Jin Kim

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

The effect of oscillatory shear flows on turbulent transport of passive scalar fields is studied by numerical computations based on the results provided by E. Kim [Physics of Plasmas 13, 022308 (2006)]. Turbulent diffusion is found to depend crucially on the competition between suppression due to shearing and enhancement due to resonances, depending on the characteristic time and length scales of shear flow and turbulence. Enhancements in transport occur for turbulence with finite memory time either due to Doppler or parametric resonances. Scalings of turbulence amplitude and transport are provided in different parameter spaces. The results suggest that oscillatory shear flows are not only less efficient in regulating turbulence, but also can enhance the value of turbulent diffusion, accelerating turbulent transport.

Original language	English
Article number	122306
Journal	Physics of Plasmas
Volume	14
Issue number	12
DOIs	https://doi.org/10.1063/1.2821246
Publication status	Published - 27 Dec 2007
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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10.1063/1.2821246

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Newton, A. P. L., & Kim, E. J. (2007). Resonance enhanced turbulent transport. Physics of Plasmas, 14(12), [122306]. https://doi.org/10.1063/1.2821246

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