A fast second-order accurate method for a two-sided space-fractional diffusion equation with variable coefficients
A fast second-order accurate method for a two-sided space-fractional diffusion equation with variable coefficients
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变系数双边空间分数扩散方程的快速二阶精确方法
DOI:
10.1016/j.camwa.2016.06.007
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发表时间:
2016-07
期刊:
影响因子:
--
通讯作者:
J. Li
中科院分区:
文献类型:
--
作者:
F. Liu;I. Turner;V. Anh;J. Li
In this paper, we consider a type of fractional diffusion equation (FDE) with variable coefficients on a finite domain. Firstly, we utilize a second-order scheme to approximate the Riemann–Liouville fractional derivative and present the finite difference scheme. Specifically, we discuss the Crank–Nicolson scheme and solve it in matrix form. Secondly, we prove the stability and convergence of the scheme and conclude that the scheme is unconditionally stable and convergent with the second-order accuracy of O (τ 2+ h 2). Furthermore, we develop a fast accurate iterative method for the Crank–Nicolson scheme, which only requires storage of O (m) and computational cost of O (m log m) while retaining the same accuracy and approximation property as Gauss elimination, where m= 1/h is the partition number in space direction. Finally, several numerical examples are given to show the effectiveness of the numerical method, and the results are in excellent agreement with the theoretical analysis.
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影响因子:
2.9
作者:
Chen, Minghua;Deng, Weihua
通讯作者:
Deng, Weihua
DOI:
10.1016/j.camwa.2015.09.012
发表时间:
2015-11
期刊:
Comput. Math. Appl.
影响因子:
--
作者:
Yang Liu;Yanwei Du;Hong Li;Jichun Li;Siriguleng He
通讯作者:
Yang Liu;Yanwei Du;Hong Li;Jichun Li;Siriguleng He
DOI:
10.1201/9780429493393
发表时间:
2018-12
期刊:
--
影响因子:
--
作者:
Mohamed Ismail;M. Hessein
通讯作者:
Mohamed Ismail;M. Hessein
DOI:
10.1137/0913035
发表时间:
1992-03-01
期刊:
SIAM JOURNAL ON SCIENTIFIC AND STATISTICAL COMPUTING
影响因子:
--
作者:
VANDERVORST, HA
通讯作者:
VANDERVORST, HA
DOI:
10.1016/j.jcp.2010.07.011
发表时间:
2010-10
期刊:
J. Comput. Phys.
影响因子:
--
作者:
Hong Wang;Kaixin Wang;Treena Sircar
通讯作者:
Hong Wang;Kaixin Wang;Treena Sircar