| 1 | Parallel Algebraic Multigrid Methods in Gyrokinetic Turbulence Simulations显示文摘Parallel algebraic multigrid methods in gyrokinetic turbulence simulations are presented.Discretized equations of the elliptic operator−■^(2)u+αu=f(with bothα=0 and α≠0)are ubiquitous in magnetically confined fusion plasma applications.Whenαis equal to zero a“pure”Laplacian or Poisson equation results and whenαis greater than zero a so called Helmholtz equation is produced.Taking a gyrokinetic turbulence simulation model as a testbed,we investigate the performance characteristics of basic classes of linear solvers(direct,one-level iterative,and multilevel iterative methods)on 2D unstructured finite element method(FEM)problems for both the Poisson and the Helmholtz equations. | M.F.Adams Y.Nishimura | 2007 | Communications in Computational Physics2007，2，5： | 0 |
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