کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9867914 | 1530674 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nonlinear excitation of coherent structures and associated cross-field transport in a magnetized plasma
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Nonlinear excitation of coherent structures and associated cross-field transport in a magnetized plasma Nonlinear excitation of coherent structures and associated cross-field transport in a magnetized plasma](/preview/png/9867914.png)
چکیده انگلیسی
Nonlinear interactions between zero-frequency electrostatic convective cells (CCs)/zonal flows (ZFs) and magnetostatic (MS) modes in a magnetoplasma are numerically investigated. These nonlinearly coupled flute-like modes can be spontaneously excited, and contribute significantly to the anomalous cross-field transport. While they are degenerate in a linear regime and form purely damped modes, their mutual nonlinear interactions give rise to large-scale coherent structures through a turbulent relaxation that leads to a self-organization via an inverse cascade. Remarkably, we find that nonlinear excitations of large-scale structures give rise to an effective cross-field diffusion coefficient that varies initially as â¼t1/2 with time, and enhances the transport level dramatically.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 345, Issues 1â3, 26 September 2005, Pages 191-196
Journal: Physics Letters A - Volume 345, Issues 1â3, 26 September 2005, Pages 191-196
نویسندگان
Dastgeer Shaikh, P.K. Shukla,