Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics

Ogata, D.; Newman, D. E.; Sánchez, R.

doi:10.1063/1.4993209

Title: Transport dynamics of self-consistent, near-marginal drift-wave turbulence. I. Investigation of the ability of external flows to tune the non-diffusive dynamics

Journal Article · Tue Jul 18 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4993209· OSTI ID:1474294

^[1]; Newman, D. E. ^[1]; Sánchez, R. ^[2]

Univ. of Alaska, Fairbanks, AK (United States)
Univ. Carlos III, Madrid (Spain)

The reduction of turbulent transport across sheared flow regions has been known for a long time in magnetically confined toroidal plasmas. However, details of the dynamics are still unclear, in particular, in what refers to the changes caused by the flow on the nature of radial transport itself. In Paper II, we have shown in a simplified model of drift wave turbulence that, when the background profile is allowed to evolve self-consistently with fluctuations, a variety of transport regimes ranging from superdiffusive to subdiffusive open up depending on the properties of the underlying turbulence. In this study, we show that externally applied sheared flows can, under the proper conditions, cause the transport dynamics to be diffusive or subdiffusive

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Research Organization:: Univ. of Alaska, Fairbanks, AK (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-04ER54741

OSTI ID:: 1474294

Alternate ID(s):: OSTI ID: 1371793

Journal Information:: Physics of Plasmas, Vol. 24, Issue 7; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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