Influence of plasma size on heat and momentum transport in global steady-state ITG simulations

大域的定常イオン温度勾配駆動乱流シミュレーションにおける熱と運動量の輸送に対するプラズマサイズの影響

Jolliet, S.*; 井戸村 泰宏   

Jolliet, S.*; Idomura, Yasuhiro

Influences of plasma size on heat and momentum transport in the ion temperature gradient driven turbulence is addressed using a global gyrokinetic full-f Eulerian code GT5D. In GT5D, gyrokinetic equations are first implemented up to third order accuracy in the gyrokinetic ordering, and the convergence of turbulent momentum transport is demonstrated. By using highly accurate global gyrokinetic simulations, so-called worse than Bohm scaling of ion heat transport, which were observed in former experiments, is first recovered, and roles of intrinsic rotation produced by the residual stress or the turbulent momentum transport is clarified.