Abstract
In the low-order isotropic k space introduced by Kells and Orszag for the two-dimensional Euler equation, the evolution of the fluctuations arising from the electron drift wave instability is studied. The two-dimensional drift wave model contains the E×B and polarization drift nonlinearities in the hydrodynamic ions and linear, dissipative electrons. The strength of the electron dissipation is shown to determine the spectral width and the level of the fluctuations.
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