Volume 4, Issue 5
Gyrofluid Simulation of Ion-scale Turbulence in Tokamak Plasmas

Jiquan Li & Y. Kishimoto

DOI:

Commun. Comput. Phys., 4 (2008), pp. 1245-1257.

Published online: 2008-11

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  • Abstract

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 zonalflows. Thenonlinear equations aresolved 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. 

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@Article{CiCP-4-1245, author = {Jiquan Li and Y. Kishimoto}, title = {Gyrofluid Simulation of Ion-scale Turbulence in Tokamak Plasmas}, journal = {Communications in Computational Physics}, year = {2008}, volume = {4}, number = {5}, pages = {1245--1257}, abstract = {

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 zonalflows. Thenonlinear equations aresolved 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. 

}, issn = {1991-7120}, doi = {https://doi.org/}, url = {http://global-sci.org/intro/article_detail/cicp/7836.html} }
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