Resonance enhanced turbulent transport

Andrew P.L. Newton, Eun Jin Kim

Research output: Contribution to journalArticle

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 languageEnglish
Article number122306
JournalPhysics of Plasmas
Volume14
Issue number12
DOIs
Publication statusPublished - 27 Dec 2007
Externally publishedYes

Fingerprint

turbulence
shear flow
turbulent diffusion
augmentation
shearing
retarding
scalars
scaling
physics

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Resonance enhanced turbulent transport. / Newton, Andrew P.L.; Kim, Eun Jin.

In: Physics of Plasmas, Vol. 14, No. 12, 122306, 27.12.2007.

Research output: Contribution to journalArticle

Newton, Andrew P.L. ; Kim, Eun Jin. / Resonance enhanced turbulent transport. In: Physics of Plasmas. 2007 ; Vol. 14, No. 12.
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