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

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.
Authors:
 [1] ;  [1] ;  [2]
  1. Seoul National Univ. (Korea, Republic of)
  2. Univ. of California, San Diego, CA (United States)
Publication Date:
Grant/Contract Number:
FG02-04ER54738; NSF PHY11- 25915
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 12; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of California, San Diego, CA (United States)
Sponsoring Org:
USDOE; National Research Foundation of Korea (NRF); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1468788
Alternate Identifier(s):
OSTI ID: 1233930

Guo, Z. B., Hahm, T. S., and Diamond, P. H.. Small scale coherent vortex generation in drift wave-zonal flow turbulence. United States: N. p., Web. doi:10.1063/1.4938044.
Guo, Z. B., Hahm, T. S., & Diamond, P. H.. Small scale coherent vortex generation in drift wave-zonal flow turbulence. United States. doi:10.1063/1.4938044.
Guo, Z. B., Hahm, T. S., and Diamond, P. H.. 2015. "Small scale coherent vortex generation in drift wave-zonal flow turbulence". United States. doi:10.1063/1.4938044. https://www.osti.gov/servlets/purl/1468788.
@article{osti_1468788,
title = {Small scale coherent vortex generation in drift wave-zonal flow turbulence},
author = {Guo, Z. B. and Hahm, T. S. and Diamond, P. H.},
abstractNote = {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.},
doi = {10.1063/1.4938044},
journal = {Physics of Plasmas},
number = 12,
volume = 22,
place = {United States},
year = {2015},
month = {12}
}