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22-27 October 2018
Mahatma Mandir Conference Centre
Asia/Kolkata timezone
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Highly collisional two-fluid and gyrokinetic simulations of tokamak edge turbulence and the transition between kinetic and fluid regime

26 Oct 2018, 14:00
4h 45m
Mahatma Mandir Conference Centre

Mahatma Mandir Conference Centre

Gandhinagar (nearest Airport: Ahmedabad), India
Poster P8 Posters

Speaker

Dr Klaus Hallatschek (Max-Planck-Institute for Plasma Physics)

Description

Gyrokinetic and non-local fluid codes have complementary limitations in the tokamak edge. To arrive at a common basis, the gyrokinetic code CGYRO and the non-local two-fluid code NLET have both been applied to identical parameters sets ranging from resistive ballooning turbulence - approaching the collisional fluid limit - relevant to the edge of a tokamak, up to high-gradient kinetic ITG modes at higher temperatures in the core-edge transitional regime, yielding comparable results. As a non-trivial, novel result, linear growth rate and nonlinear transport agree between the codes in the fluid limit of high collision numbers (nu_e~500-10000 c_i/R), not least, because the kinetic code employs the Sugama collision operator with momentum and energy conservation, Galileian invariance and exact self-adjointness property.
Country or International Organization Germany
Paper Number TH/P8-1

Primary author

Dr Klaus Hallatschek (Max-Planck-Institute for Plasma Physics)

Presentation Materials

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Paper