Low-rank approximation in the numerical modeling of the Farley-Buneman instability in ionospheric plasma
Low-rank approximation in the numerical modeling of the Farley-Buneman instability in ionospheric plasma
复制标题
电离层等离子体 Farley-Buneman 不稳定性数值模拟中的低阶近似
DOI:
10.1016/j.jcp.2014.01.029
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
E. Tyrtyshnikov
中科院分区:
文献类型:
--
作者:
S. Dolgov;A. Smirnov;E. Tyrtyshnikov
We consider numerical modeling of the Farley–Buneman instability in the Earth's ionosphere plasma. The ion behavior is governed by the kinetic Vlasov equation with the BGK collisional term in the four-dimensional phase space, and since the finite difference discretization on a tensor product grid is used, this equation becomes the most computationally challenging part of the scheme. To relax the complexity and memory consumption, an adaptive model reduction using the low-rank separation of variables, namely the Tensor Train format, is employed.The approach was verified via a prototype MATLAB implementation. Numerical experiments demonstrate the possibility of efficient separation of space and velocity variables, resulting in the solution storage reduction by a factor of order tens.
DOI:
10.1016/j.cpc.2013.12.017
发表时间:
2013-06
期刊:
Comput. Phys. Commun.
影响因子:
--
作者:
S. Dolgov;B. Khoromskij;I. Oseledets;D. Savostyanov
通讯作者:
S. Dolgov;B. Khoromskij;I. Oseledets;D. Savostyanov
影响因子:
1.1
作者:
D. Savostyanov
通讯作者:
D. Savostyanov
影响因子:
3.1
作者:
Dolgov, Sergey V.;Savostyanov, Dmitry V.
通讯作者:
Savostyanov, Dmitry V.