Gyrofluid Simulation of Ion-Scale Turbulence in Tokamak Plasmas  

作　　者：Jiquan Li Y.Kishimoto 

机构地区：[1]Graduate School of Energy Science,Kyoto University,Uji,Kyoto 611-0011,Japan [2]Institute for Fusion Theory and Simulation,ZhejiangUniversity,Hangzhou,China

出　　处：《Communications in Computational Physics》2008年第10期1245-1257,共13页计算物理通讯（英文）

基　　金：This work was sup-ported by theGrant-in-Aid fromJapan Society for the Promotion of Science(No.18340186 and 19560828);partly by theNational Science Foundation of China GrantNo.10575032 and by the JSPS-CAS Core University Program(CUP)on Plasma and Nuclear Fusion。

摘　　要：An improved three-field gyrofluid model is proposed to numerically simulate ion-scale turbulence in tokamak plasmas,which includes the nonlinear evolution of perturbed electrostatic potential,parallel ion velocity and ion pressure with adiabatic electron response.It is benchmarked through advancing a gyrofluid toroidal global(GFT G)code as well as the local version(GFT L),with the emphasis of the collisionless damping of zonal flows.The nonlinear equations are solved by using Fourier decomposition in poloidal and toroidal directions and semi-implicit finite difference method along radial direction.The numerical implementation is briefly explained,especially on the periodic boundary condition in GFT L version.As a numerical test and also practical application,the nonlinear excitation of geodesic acoustic mode(GAM),as well as its radial structure,is investigated in tokamak plasma turbulence.

关 键 词：Geodesic acoustic mode(GAM) zonal flow ion temperature gradient(ITG)turbulence gyrofluid simulation TOKAMAK 

分 类 号：TL6[核科学技术—核技术及应用]