Role of density modulation in driving nonlinear streamer flows in drift wave turbulence

Y. Kosuga, K. Hasamada

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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 languageEnglish
Article number100701
JournalPhysics of Plasmas
Volume25
Issue number10
DOIs
Publication statusPublished - Oct 1 2018

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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