Global flux-driven gyrofluid simulations of internal transport barrier formation by external torque in weak magnetic shear configuration
S.H. Ko,
S.S. Kim,
Hogun Jhang
et al.
Abstract:Using a global gyrofluid code, we conduct comprehensive flux-driven simulations incorporating external heat and momentum sources/sinks. They involve an external torque ramp keeping a heating power constant. Simulations show the formation of internal transport barriers (ITBs) in ion heat and parallel momentum in weak magnetic shear configuration. The ITB formation is attributed to the reduction of turbulent transport accompanied by strong E × B flow shear generation, where the majority of E × B shear arises fro… Show more
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