Abstract
The role of density modulation in driving streamer flows in drift wave turbulence is discussed. In contrast to the conventional shearing mechanism, we emphasize the impact of frequency modulation by meso-scale density perturbation. This mechanism is more effective for streamers than for zonal flows. The Reynolds stress and nonlinear growth rate are calculated. The result indicates that the streamer growth is enhanced due to the density modulation. Implications on the selection of streamers and zonal flows are discussed as well.
| Original language | English |
|---|---|
| Article number | 100701 |
| Journal | Physics of Plasmas |
| Volume | 25 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1 2018 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Cite this
Role of density modulation in driving nonlinear streamer flows in drift wave turbulence. / Kosuga, Yusuke; Hasamada, K.
In: Physics of Plasmas, Vol. 25, No. 10, 100701, 01.10.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Role of density modulation in driving nonlinear streamer flows in drift wave turbulence
AU - Kosuga, Yusuke
AU - Hasamada, K.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The role of density modulation in driving streamer flows in drift wave turbulence is discussed. In contrast to the conventional shearing mechanism, we emphasize the impact of frequency modulation by meso-scale density perturbation. This mechanism is more effective for streamers than for zonal flows. The Reynolds stress and nonlinear growth rate are calculated. The result indicates that the streamer growth is enhanced due to the density modulation. Implications on the selection of streamers and zonal flows are discussed as well.
AB - The role of density modulation in driving streamer flows in drift wave turbulence is discussed. In contrast to the conventional shearing mechanism, we emphasize the impact of frequency modulation by meso-scale density perturbation. This mechanism is more effective for streamers than for zonal flows. The Reynolds stress and nonlinear growth rate are calculated. The result indicates that the streamer growth is enhanced due to the density modulation. Implications on the selection of streamers and zonal flows are discussed as well.
UR - http://www.scopus.com/inward/record.url?scp=85054984215&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85054984215&partnerID=8YFLogxK
U2 - 10.1063/1.5049726
DO - 10.1063/1.5049726
M3 - Article
AN - SCOPUS:85054984215
VL - 25
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 10
M1 - 100701
ER -