Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas

S. Nishimura, S. Benkadda, M. Yagi, Sanae Itoh, K. Itoh

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The rotation frequency of the drift-tearing mode is investigated with numerical simulations of reduced two-fluid equations. An extended analytical formula of the rotation frequency of the drift-tearing mode is derived, and is used to analyze numerical results. It is found that the rotation frequency depends strongly on the poloidal zonal flow generated by the drift-tearing mode. The dependence of the rotation frequency on transport coefficients is examined in the nonlinear saturation phase. It is found that ion viscosity μ and parallel resistivity η|| play important roles by controlling the self-generated zonal flow through the change of the balance between the Reynolds stress and the Maxwell stress. The dependence of the rotation frequency on the magnetic Prandtl number μ/η|| shows a monotonic increase.

Original languageEnglish
Article number092506
JournalPhysics of Plasmas
Volume15
Issue number9
DOIs
Publication statusPublished - Oct 9 2008

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Reynolds stress
Prandtl number
transport properties
viscosity
saturation
electrical resistivity
fluids
ions
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Nishimura, S., Benkadda, S., Yagi, M., Itoh, S., & Itoh, K. (2008). Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas. Physics of Plasmas, 15(9), [092506]. https://doi.org/10.1063/1.2980286

Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas. / Nishimura, S.; Benkadda, S.; Yagi, M.; Itoh, Sanae; Itoh, K.

In: Physics of Plasmas, Vol. 15, No. 9, 092506, 09.10.2008.

Research output: Contribution to journalArticle

Nishimura, S, Benkadda, S, Yagi, M, Itoh, S & Itoh, K 2008, 'Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas', Physics of Plasmas, vol. 15, no. 9, 092506. https://doi.org/10.1063/1.2980286
Nishimura, S. ; Benkadda, S. ; Yagi, M. ; Itoh, Sanae ; Itoh, K. / Nonlinear dynamics of rotating drift-tearing modes in tokamak plasmas. In: Physics of Plasmas. 2008 ; Vol. 15, No. 9.
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