Radial propagation of turbulence in tokamaks
1994
It is shown that turbulence propagation can be due to toroidal or non-linear mode coupling. An analytical analysis indicates that the toroidal coupling acts through convection while the non-linear effects induce diffusion. Numerical simulations suggest that the toroidal propagation is usually the faster process, except perhaps in some highly turbulent regimes. A consequence is the possibility of non-local effects on the fluctuation level and the associated transport
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