5 papers
2DESR: a two-dimensional Fourier-space gyrokinetic eigenvalue code for the ion-temperature-gradient modes in tokamaks
Haochuan Wang, Jie Wang, Yuefeng Qiu +6
A two-dimensional (2D) gyrokinetic eigenvalue solver, 2DESR, has been developed to solve the 2D gyrokinetic eigenvalue problem in the poloidal Fourier space for the ion-temperature…
Unified mesoscale picture of nonlinear generation of zonal flows in toroidal geometry
Zihao Wang, Shaojie Wang
Recent experimental findings on limit-cycle-oscillations indicate that the nonlinear driving of the turbulent poloidal Reynolds stress to zonal flows is not a significant factor in…
Numerical dissipation induced by the low-pass filtering in nonlinear gyrokinetic simulations
Zihao Wang, Shaojie Wang
De-aliasing is an essential procedure for eliminating the aliasing error in nonlinear simulations, such as nonlinear gyrokinetic turbulence simulations. An ideal approach to de-ali…
Discretization form of the continuity condition at the polar axis, with application to the gyrokinetic simulation in a magnetic fusion torus
Tiannan Wu, Zihao Wang, Shaojie Wang
A new computational method to solve the hyperbolic (Vlasov) equation and the elliptic (Poisson-like) equation at the polar axis is proposed. It is shown that the value of a scalar…
Evolution of self-organized structure, the internal transport barrier in the ion-temperature-gradient driven gyrokinetic turbulence
S. Wang, Z. Wang, T. Wu
Understanding the self-organization of the most promising internal transport barrier in fusion plasmas needs a long-time nonlinear gyrokinetic global simulation. The Neighboring Eq…