Random forcing with a constant power input for two-dimensional gyrokinetic simulations

Abstract

A method of random forcing with a constant power input for two-dimensional gyrokinetic turbulence simulations is developed for the study of stationary plasma turbulence. The property that the forcing term injects the energy at a constant rate enables to set up turbulence in the desired range and to quantitatively assess energy dissipation channels in a statistically steady state. Using the developed method, turbulences in the large scale fluid and small scale kinetic regimes are demonstrated, where the theoretically predicted scaling laws are successfully reproduced.

22 pages, 9 figure, submitted to J. Plasma Phys.; replaced to match published version