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Simulations are performed to investigate turbulent properties of nonlinearlyinteracting two-dimensional (2D) magnetic electron drift vortex (MEDV) modes ina nonuniform unmagnetized plasma. The relevant nonlinear equations governingthe dynamics of the MEDV modes are the wave magnetic field and electrontemperature perturbations in the presence of the equilibrium density andtemperature gradients. The important nonlinearities come from the advection ofthe electron fluid velocity perturbation and the electron temperature, as wellas from the nonlinear electron Lorentz force. Computer simulations of thegoverning equations for the nonlinear MEDV modes reveal the generation ofstreamer-like electron flows, such that the corresponding gradients in thedirection of the inhomogeneities tend to flatten out. By contrast, thegradients in an orthogonal direction vary rapidly. Consequently, the inertialrange energy spectrum in decaying MEDV mode turbulence exhibits a much steeperanisotropic spectral index. The magnetic structures in the MEDV mode turbulenceproduce nonthermal electron transport in our nonuniform plasma.

Simulations of 2D magnetic electron drift vortex mode turbulence in plasmas