Theory of drift-thermal instability-induced turbulence

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Abstract
A simple model for drift‐thermal instability‐induced turbulence is derived and studied both analytically and numerically. Both nonlocal, nonlinear analytical calculations and three‐dimensional computations are used. Potential and temperature fluctuation levels and radial correlation lengths are calculated and compared to numerical results. The saturation mechanism and the role of a fluctuation‐generated shear flow are elucidated. The numerical calculations are used to obtain spectra and correlation lengths. A detailed comparison of analytical and numerical results is given.