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Effect of local toroidal flow on double‐tearing modes in cylindrical geometry
Author(s) -
Zhang Ruibo,
Lu Xingqiang,
Guo Wei,
Yin Chenyan,
Gong Xueyu
Publication year - 2020
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.202000026
Subject(s) - tearing , toroid , flow (mathematics) , magnetohydrodynamics , rational surface , mechanics , shear (geology) , physics , magnetic field , geometry , toroidal and poloidal , shear flow , classical mechanics , materials science , plasma , mathematics , nuclear physics , thermodynamics , quantum mechanics , composite material
The effect of local toroidal flow (LTF) on double‐tearing modes (DTMs) is investigated in cylindrical geometry using the reduced magnetohydrodynamics (RMHD) model. The results indicate that the LTF between the two rational surfaces is the dominant suppression effect on DTMs. The suppression effect is enhanced with the flow width increasing, and the DTMs become more stable with the increase of the shear of the LTF between the two rational surfaces. So, in the reversed shear magnetic field configuration, the local flow is driven between the two rational surfaces, which can effectively suppress the development of DTMs and maintain the high‐performance state.