Implicit Runge-Kutta and spectral Galerkin methods for the two-dimensional nonlinear Riesz space fractional diffusion equation

被引:6
|
作者
Zhao, Jingjun [1 ]
Zhang, Yanming [2 ]
Xu, Yang [2 ]
机构
[1] Qufu Normal Univ, Sch Math Sci, Qufu 273165, Shandong, Peoples R China
[2] Harbin Inst Technol, Sch Math, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
Nonlinear Riesz space fractional equation; Implicit Runge-Kutta method; Spectral Galerkin method; Convergence; Stability; COMPACT ADI SCHEME; ANOMALOUS DIFFUSION; COLLOCATION METHOD; DIFFERENCE SCHEME; APPROXIMATION; 4TH-ORDER; EFFICIENT;
D O I
10.1016/j.amc.2020.125505
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A numerical method with high accuracy both in time and in space is proposed for the two-dimensional nonlinear Riesz space fractional diffusion equation. The main idea is based on a spectral Galerkin method in spatial direction and an s-stage implicit Runge-Kutta method in temporal direction. A rigorous stability and error analysis is performed for the proposed method. It is shown that the proposed method is stable and convergent. The optimal spa-tial error estimate is also derived. Numerical experiments are provided to illustrate the theoretical results. (C) 2020 Elsevier Inc. All rights reserved.
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页数:15
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