期刊
PHYSICS LETTERS A
卷 288, 期 3-4, 页码 214-219出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0375-9601(01)00549-7
关键词
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The origin of anisotropic secondary flows, such as zonal flows and streamers, in drift wave turbulence is examined, A unified description including diffraction effects is given for zonal flow and streamer generation via envelope modulation of drift-wave packet. Stability boundaries, nonlinear growth rates and typical structure scales are determined for both streamer and zonal flow. A novel result is the determination of the characteristic width of those structures. which is found to depend on intrinsically nonlinear processes. (C) 2001 Elsevier Science B.V. All rights reserved.
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