Reduction in intermittent transport by shearing

Eun Jin Kim

doi:10.1063/1.1864075

Reduction in intermittent transport by shearing

Eun Jin Kim

University of Sheffield

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The intermittent transport due to coherent structures (streamers) is shown to be dramatically reduced by the shearing of mean flow in passive scalar field model, with the scaling ∝ Ω^-3. Here, Ω is the shearing rate of the mean flow. This reduction is much stronger than that in turbulent transport (∝ Ω^-1) [Kim and Diamond, Phys. Rev. Lett. 91, 075001 (2003)] in the same model. Implications for the transition from low to high confinement (L-H transition) are discussed.

Original language	English
Article number	044501
Number of pages	3
Journal	Physics of Plasmas
Volume	12
Issue number	4
DOIs	https://doi.org/10.1063/1.1864075
Publication status	Published - 11 Mar 2005
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics

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10.1063/1.1864075

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title = "Reduction in intermittent transport by shearing",

abstract = "The intermittent transport due to coherent structures (streamers) is shown to be dramatically reduced by the shearing of mean flow in passive scalar field model, with the scaling ∝ Ω-3. Here, Ω is the shearing rate of the mean flow. This reduction is much stronger than that in turbulent transport (∝ Ω-1) [Kim and Diamond, Phys. Rev. Lett. 91, 075001 (2003)] in the same model. Implications for the transition from low to high confinement (L-H transition) are discussed.",

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AB - The intermittent transport due to coherent structures (streamers) is shown to be dramatically reduced by the shearing of mean flow in passive scalar field model, with the scaling ∝ Ω-3. Here, Ω is the shearing rate of the mean flow. This reduction is much stronger than that in turbulent transport (∝ Ω-1) [Kim and Diamond, Phys. Rev. Lett. 91, 075001 (2003)] in the same model. Implications for the transition from low to high confinement (L-H transition) are discussed.

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Reduction in intermittent transport by shearing

Abstract

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