Small scale coherent vortex generation in drift wave-zonal flow turbulence

Guo, Z. B.; Hahm, T. S.; Diamond, P. H.

doi:10.1063/1.4938044

Small scale coherent vortex generation in drift wave-zonal flow turbulence

Journal Article · Tue Dec 01 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4938044· OSTI ID:1468788

Guo, Z. B. ^[1]; Hahm, T. S. ^[2]; Diamond, P. H. ^[3]

Seoul National Univ. (Korea, Republic of); Seoul National Univ. (Korea)
Seoul National Univ. (Korea, Republic of)
Univ. of California, San Diego, CA (United States)

We present a paradigm for the generation of small scale coherent vortex (SSCV) in drift wave-zonal flow (DW-ZF) turbulence. Here, we demonstrate that phases of DWs can couple coherently, mediated by the ZF shearing. A SSCV is formed when the phases of the DWs are “attracted” to form a stable “phase cluster.” We show that the ZF shearing induces asymmetry between “attractive” and “repulsive” phase couplings, so that a net attractive phase coupling results. The turbulent DWs will (partially)synchronize into a stable SSCV at locations, where the attractive phase coupling induced by the ZF shearing exceeds the “detuning” effects by the DW dispersion and random phase scattering. We also discuss the “self-binding” effect of the newly formed SSCV.

Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: National Research Foundation of Korea (NRF); National Science Foundation (NSF); USDOE

Grant/Contract Number:: FG02-04ER54738

OSTI ID:: 1468788

Alternate ID(s):: OSTI ID: 1233930
OSTI ID: 22489922

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 22; ISSN PHPAEN; 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)

Another look at zonal flows: Resonance, shearing, and frictionless saturation Li, J. C.; Diamond, P. H. Physics of Plasmas, Vol. 25, Issue 4 https://doi.org/10.1063/1.5027107	journal	April 2018

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