4 papers · 1 filter
A non-twisting flux tube for local gyrokinetic simulations
Justin Ball, Stephan Brunner
Local gyrokinetic simulations use a field-aligned domain that twists due to the magnetic shear of the background magnetic equilibrium. However, if the magnetic shear is strong and/…
Toroidal and slab ETG instability dominance in the linear spectrum of JET-ILW pedestals
Jason F. Parisi, Felix I. Parra, Colin M. Roach +9
Local linear gyrokinetic simulations show that electron temperature gradient (ETG) instabilities are the fastest growing modes for in the steep gradient regio…
Eliminating turbulent self-interaction through the parallel boundary condition in local gyrokinetic simulations
Justin Ball, Stephan Brunner, Ajay C. J
In this work, we highlight an issue that may reduce the accuracy of many local nonlinear gyrokinetic simulations - turbulent self-interaction through the parallel boundary conditio…
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit
Justin Ball, Stephan Brunner, Ben F. McMillan
The cold ion limit of the local gyrokinetic model is rigorously taken to produce a nonlinear system of fluid equations that includes background flow shear. No fluid closure is requ…