کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9793861 | 1514281 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the energy transfer between flows and turbulence in the plasma boundary of fusion devices
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: On the energy transfer between flows and turbulence in the plasma boundary of fusion devices On the energy transfer between flows and turbulence in the plasma boundary of fusion devices](/preview/png/9793861.png)
چکیده انگلیسی
The energy transfer between perpendicular flows and turbulence has been investigated in the JET plasma boundary region. The energy transfer from DC flows to turbulence, directly related with the momentum flux (e.g. ãvËθvËrã) and the radial gradient in the flow, can be both positive and negative in the proximity of sheared flows. The direct computation of the turbulent viscosity gives values comparable to the anomalous particle diffusivitiy (in the order of 1 m2/s). Furthermore, this energy transfer rate is comparable with the mean flow kinetic energy normalized to the correlation time of turbulence, implying that this energy transfer is significant. These results show, for the first time, the dual role of turbulence as a damping (eddy viscosity) and driving of flows in fusion plasmas emphasizing the important role of turbulence to understand perpendicular dynamics in the plasma boundary region of fusion plasmas.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volumes 337â339, 1 March 2005, Pages 296-300
Journal: Journal of Nuclear Materials - Volumes 337â339, 1 March 2005, Pages 296-300
نویسندگان
E. Sánchez, C. Hidalgo, B. Gonçalves, C. Silva, M.A. Pedrosa, M. Hron, K. Erents, JET EFDA contributors JET EFDA contributors,