Structure and dynamics of flux-driven turbulent transport dominated by non-locality

Abstract

We present a picture of flux-driven ITG turbulence and associated transport with heat source and sink which reveals resilience and stiffness coupled with SOC type intermittent bursts. The transport is found to be regulated by the different types of non-diffusive processes. We study the generation mechanism of radial electric field E_r, which results from zonal flow and pressure. The spatio-temporal linkage of different non-diffusive processes is found to lead to a new turbulent state dominated by long range correlation in time and space.

Keywords:

• Flux-driven global gyro-kinetic simulation
• ITG turbulence
• profiler relaxation
• profile stiffness
• non-diffusive transport
• staircase

Acknowledgement

This abstract was written based on JSPS A3 Scientific Report, NIFS-PROC-108(2016) and NIFS-PROC-109(2017).

Disclosure statement

No potential conflict of interest was reported by the authors.