PPPL-3847 is available in <a href="PPPL-3847.pdf">pdf</a> format (872 KB).

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<b>Zonal Flow Dynamics and Size-scaling of Anomalous Transport</b>
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<b>Authors:</b> Liu Chen, Roscoe B. White, and F. Zonca
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<b>Date of PPPL Report:</b> July 2003
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<b>Published in:</b> Physical Review Letters <b>92</b>  (20 February 2004) 075004/1-4</p>


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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 4-wave drift wave-zonal flow modulation interaction model of Chen, Lin, and White [Phys. Plasmas <b>7</b> (2000) 3129]. Solutions clearly demonstrate turbulence spreading due to nonlinearly enhanced dispersiveness and, consequently, the device-size dependence of the saturated wave intensities and transport coefficients.




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