A study of turbulent transport of an advective nature in a fluid plasma

초록

The advective nature of the electrostatic turbulent flux of plasma energy in Fourier space is studied numerically in a nearly adiabatic state. Such a state is represented by the Hasegawa-Mima equation, which is driven by a noise that may model the destabilization due to the phase mismatch of the plasma density and the electric potential. The noise is assumed to be Gaussian and not to be invariant under reflection along a direction Ae. The flux density induced by such noise is found to be anisotropic: While it is random along Ae, it is not along the perpendicular direction Ae (aSyen), and the flux is not diffusive. The renormalized response may be approximated as advective, with the velocity being proportional to (k rho (s) )(2), in the Fourier space .

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