Zonal-flow dynamics and size scaling of anomalous transport.
Nonlinear equations for the slow space-time evolution of the radial drift-wave envelope and zonal flow amplitude have been self-consistently derived for a model nonuniform tokamak equilibrium within the coherent four-wave drift wave-zonal flow modulation interaction model of Chen, Lin, and White [Phys. Plasmas 7, 3129 (2000)]]. Solutions clearly demonstrate turbulence spreading due to nonlinearly enhanced dispersiveness and, consequently, the device-size dependence of the saturated wave intensities and transport coefficients.
Chen
Liu
L
Department of Physics and Astronomy, University of California, Irvine, CA 92717-4575, USA.
White
Roscoe B
RB
Zonca
F
F