Eliminating turbulent self-interaction through the parallel boundary condition in local gyrokinetic simulations

• Published in: Journal of plasma physics Vol. 86; no. 2
• Main Authors: Ball, Justin, Brunner, Stephan, C.J., Ajay
• Format: Journal Article
• Language: English
• Published: Cambridge Cambridge University Press 01.04.2020
• Subjects: Boundary conditions; Computer simulation; Domains; Eddies; Heat flux; Magnetic fields; Parameter modification; Plasma; Plasma physics; Simulation; Turbulence

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 condition. Given a sufficiently long parallel correlation length, individual turbulent eddies can span the full domain and ‘bite...