(TH/P8-29) Symmetry breaking effects of toroidicity on toroidal momentum transport

J. Weiland1), R. Singh2), H. Nordman1), P. Kaw2), A.G. Peeters3), D. Strintzi4)
1) Chalmers University of Technology, Göteborg, Sweden
2)Institute for Plasma Research, Bhat, Gandhinagar, India
3) Centre for Fusion, Space and Astrophysics, Physics department, University of Warwick, Conentry, UK
4)Department of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece

Abstract.   A derivation of symmetry breaking toroidicity effects on toroidal momentum transport has been made from the stress tensor. This effect is usually stronger than the symmetry beaking caused by the flows themselves on the eigenfunction. The model obtained generalizes a recent derivation of diagonal transport elements from the stress tensor to convective elements [1, 2] of turbulent equipartition or thermoelectric types. This gives possibility for interpretation of the same type of effects previously obtained from a phase space conserving nonlinear gyrokinetic equation [2, 3] and means that we have a consistent fluid derivation of a model that has already given promising results in predictive simulations.

[1] D. Strinzi, A.G. Peeters and J. Weiland, Accepted for publication in Phys. Plasmas. [2] A. G. Peeters, C. Angioni and D. Strinzi, Phys. Rev. Lett. 98, 265003 (2007). [3] T.S. Hahm, P.H. Diamond, O.D. Gurcan and G. Rewoldt, Phys. Plasmas 14, 072302-1 (2007).

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