A conservative Galerkin solver for the quasilinear diffusion model in magnetized plasmas
A conservative Galerkin solver for the quasilinear diffusion model in magnetized plasmas
复制标题
磁化等离子体中拟线性扩散模型的保守伽辽金求解器
DOI:
10.1016/j.jcp.2023.112220
复制
发表时间:
2023
影响因子:
4.1
通讯作者:
Gamba, Irene M.
中科院分区:
文献类型:
--
作者:
Huang, Kun;Abdelmalik, Michael;Breizman, Boris;Gamba, Irene M.
The quasilinear theory describes the resonant interaction between particles and waves with two coupled equations: one for the evolution of the particle probability density function (pdf), the other for the wave spectral energy density (sed). In this paper, we propose a conservative Galerkin scheme for the quasilinear model in three-dimensional momentum space and three-dimensional spectral space, with cylindrical symmetry.We construct an unconditionally conservative weak form, and propose a discretization that preserves the unconditional conservation property, by “unconditional” we mean that conservation is independent of the singular transition probability. The discrete operators, combined with a consistent quadrature rule, will preserve all the conservation laws rigorously. The technique we propose is quite general: it works for both relativistic and non-relativistic systems, for both magnetized and unmagnetized plasmas, and even for problems with time-dependent dispersion relations.We represent the particlepdfby continuous basis functions, and use discontinuous basis functions for the wavesed, thus enabling the application of a positivity-preserving technique. The marching simplex algorithm, which was initially designed for computer graphics, is adopted for numerical integration on the resonance manifold. We introduce a semi-implicit time discretization, and discuss the stability condition. In addition, we present numerical examples with a “bump on tail” initial configuration, showing that the particle-wave interaction results in a strong anisotropic diffusion effect on the particlepdf.
登录
查看更多内容
影响因子:
2.2
作者:
N. Besse;Y. Elskens;D. Escande;P. Bertrand
通讯作者:
N. Besse;Y. Elskens;D. Escande;P. Bertrand
影响因子:
4.6
作者:
A. Kaufman
通讯作者:
A. Kaufman
影响因子:
2.9
作者:
Zhang, Chenglong;Gamba, Irene M.
通讯作者:
Gamba, Irene M.
DOI:
10.1007/978-1-4615-7799-7_3
发表时间:
1967
期刊:
--
影响因子:
--
作者:
A. Vedenov
通讯作者:
A. Vedenov
影响因子:
4.6
作者:
LERCHE, I
通讯作者:
LERCHE, I