How to apply a turbulent transport model based on a gyrokinetic simulation for the ion temperature gradient mode in helical plasmas

How to apply a reduced model for the turbulent ion heat diffusivity [Nunami M et al. 2013 Phys. Plasmas, 20 092307] derived from a gyrokinetic code to a transport simulation is proposed. The reduced model is given by the function of the linear growth rate of the ion temperature gradient (ITG) mode a...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 561; no. 1; pp. 12020 - 9
Main Authors Toda, S, Nunami, M, Ishizawa, A, Watanabe, T-H, Sugama, H
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 27.11.2014
Subjects
Computational fluid dynamics
Computer simulation
Diffusivity
Ion temperature
Magnetic field configurations
Mathematical models
Physics
Plasmas
Plasmas (physics)
Transport
Turbulence
Zonal flow (meteorology)
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Summary:How to apply a reduced model for the turbulent ion heat diffusivity [Nunami M et al. 2013 Phys. Plasmas, 20 092307] derived from a gyrokinetic code to a transport simulation is proposed. The reduced model is given by the function of the linear growth rate of the ion temperature gradient (ITG) mode and the decay time of zonal flows. The ion temperature gradient scale length is chosen for the additional modeling to include the linear growth rate of the ITG mode from a gyrokinetic code. The formula for the zonal flow decay time is derived at the given magnetic field configuration. The calculation of an extremely low computational cost in this article reproduces the results of the reduced model for the turbulent ion heat diffusivity within allowable errors.
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/561/1/012020