Stable second-order schemes for the space-fractional Cahn-Hilliard and Allen-Cahn equations

被引:23
|
作者
Bu, Linlin [1 ]
Mei, Liquan [1 ]
Hou, Yan [2 ]
机构
[1] Xi An Jiao Tong Univ, Sch Math & Stat, Xian 710049, Shaanxi, Peoples R China
[2] Shenzhen Yun Zhong Fei Network Technol Co Ltd, Shenzhen 518000, Guangdong, Peoples R China
关键词
Fractional Cahn-Hilliard equation; Fractional Allen-Cahn equation; Convex splitting; Mass conservative; The unique solvability; Energy stable; FINITE-DIFFERENCE SCHEME; SPLITTING METHODS; FREE-ENERGY;
D O I
10.1016/j.camwa.2019.05.016
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
In this paper, we propose stable second-order numerical schemes for the fractional Cahn-Hilliard and Allen-Cahn equations, which are based on the convex splitting in time and the Fourier spectral method in space. It is shown that the scheme for the fractional Cahn-Hilliard equation preserves mass. Meanwhile, the unique solvability and energy stability of the numerical schemes for the fractional Cahn-Hilliard and Allen-Cahn equations are proved. Finally, we present some numerical experiments to confirm the accuracy and the effectiveness of the proposed methods. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3485 / 3500
页数:16
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