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Multipolar Structure of Equilibrium Shear Flow Field in Toroidal Plasmas Supported by National Natural Science Foundation of China under Grant No. 11575066 and Domestic ITER under Grant No. 2009GB105003

The multipolar velocity field structures are investigated by 2D momentum conservation equation with 3D equilibrium sheared flows in the full toroidal system. Numerical results show that the non-existence of radial velocity field in equilibrium surfaces is suitable only for the zero-order term of our...

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Bibliographic Details
Published in:Communications in theoretical physics 2019-01, Vol.71 (1)
Main Authors: He, Liu-Xiu, Liu, Ming-Hai, Cai, Hua-Kun
Format: Article
Language:English
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Summary:The multipolar velocity field structures are investigated by 2D momentum conservation equation with 3D equilibrium sheared flows in the full toroidal system. Numerical results show that the non-existence of radial velocity field in equilibrium surfaces is suitable only for the zero-order term of our 2D simulation. The non-zero-order radial velocity field is still preserved, even when converted to conventional magnetic surface coordinates. The distribution of velocity field vectors of the order of 1, 2, and 3 are presented respectively in 2, 4, and 6 polar fields with the local vortex structure. The excitation mechanisms of these velocity vortices are the coupling effects of the magneto-fluid structure patterns and the toroidal effects. These results can help us understand the complexity of core physics, the transverse transport across magnetic field by the radial plasma flow and the formation of velocity vortices.
ISSN:0253-6102
DOI:10.1088/0253-6102/71/1/91