Fast solution methods for space-fractional diffusion equations
Fast solution methods for space-fractional diffusion equations
复制标题
空间分数扩散方程的快速求解方法
DOI:
10.1016/j.cam.2013.06.002
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发表时间:
2014
影响因子:
2.4
通讯作者:
Ning Du
中科院分区:
文献类型:
--
作者:
Hong Wang;Ning Du
We develop fast solution methods for a shifted Grünwald finite difference method for steady-state and time-dependent space-fractional diffusion equations. These methods reduce the memory requirement of the finite difference scheme from O (N 2) to O (N) and the computational complexity from O (N 3) to O (N log 2 N). Preliminary numerical example runs show the utility of these methods over the traditional direct solvers of the finite difference methods, in terms of computational cost and memory requirements.
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