Small scale coherent vortex generation in drift wave-zonal flow turbulence
Abstract
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:
-
- Seoul National Univ. (Korea, Republic of)
- Univ. of California, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE; National Research Foundation of Korea (NRF); National Science Foundation (NSF)
- OSTI Identifier:
- 1468788
- Alternate Identifier(s):
- OSTI ID: 1233930
- Grant/Contract Number:
- FG02-04ER54738; NSF PHY11- 25915
- Resource 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)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
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., 2015.
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. https://doi.org/10.1063/1.4938044
Guo, Z. B., Hahm, T. S., and Diamond, P. H. Tue .
"Small scale coherent vortex generation in drift wave-zonal flow turbulence". United States. https://doi.org/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 = {Tue Dec 01 00:00:00 EST 2015},
month = {Tue Dec 01 00:00:00 EST 2015}
}
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Works referencing / citing this record:
Another look at zonal flows: Resonance, shearing, and frictionless saturation
journal, April 2018
- Li, J. C.; Diamond, P. H.
- Physics of Plasmas, Vol. 25, Issue 4