Nonlinear Simulation of Plasma Blob Formation and Radial Propagation in the Scrape-off Layer

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The nonlinear fluid simulation of the isolated plasma blob propagation and interchange turbulence in the scrape-off layer are demonstrated using 2-dimensional Hasegawa-Wakatani equation. In the propagation process of the isolated blob, density nonlinear term in the model equation has the strong effect on the dynamics of blob propagation. Interchange turbulence in the scrape-off layer is reproduced by the collapse and spread of the plasma blob which is formed by the Rayleigh-Taylor finger detached at the separatrix.

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