Phase-mixing v.s. phase synchronization in the dynamics of flow-shear induced edge transport barrier
Abstract
Nonlinear relaxation oscillations of flow-shear induced transport barriers can be qualitatively reproduced using a phenomenological critical-gradient model [M. Leconte, Y.M. Jeon and G.S. Yun, Contrib. Plasma Phys. 56, 736 (2016]. Here, we give a more in-depth analysis of the mechanism of these nonlinear oscillations, associated to nonlinear phase synchronization, in an extended version of the model including random fluctuations.
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