Global gyrokinetic simulations of ITG turbulence in the configuration space of the Wendelstein 7-X stellarator

Abstract

We study the effect of turbulent transport in different magnetic configurations of the Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the global gyrokinetic code GENE-3D, modeling the behavior of Ion Temperature Gradient turbulence in the Standard, High-Mirror, and Low-Mirror configurations of W7-X. We found that the Low-Mirror configuration produces more transport than both the High-Mirror and the Standard configurations. By comparison with radially local simulations, we have demonstrated the importance of performing global nonlinear simulations to predict the turbulent fluxes quantitatively.

References in corpus (1)

• Towards optimal explicit time-stepping schemes for the gyrokinetic equations

Cited by in corpus (8)

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• Electrostatic gyrokinetic simulations in Wendelstein 7-X geometry: benchmark between the codes stella and GENE
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• Zonal flow suppression of turbulent transport in the optimized stellarators W7-X and QSTK
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