非线性时间分布阶反应扩散耦合系统的二阶θ格式的有限元方法
A Finite Element Method with Second-order θ Scheme for Nonlinear Time Distributed-order Coupled Sub-diffusion System
侯雅馨 1袁满玉 1崔继峰 1唐斯琴1
作者信息
- 1. 内蒙古工业大学理学院,呼和浩特 010051
- 折叠
摘要
构造了 一种基于二阶θ格式的有限元(FEM)算法,用于求解非线性时间分布阶反应扩散耦合系统.使用二阶θ格式结合数值求积公式逼近时间分布阶导数,进一步形成有限元全离散格式.证明了格式的稳定性以及两个函数u和v的最优误差估计结果.最后通过数值算例验证了格式的有效性.
Abstract
A finite element method(FEM)based on second-order θ scheme is presented to solve a nonlinear time distributed-order coupled sub-diffusion system.The second-order θ scheme combined with the numerical quadrature formula is used for the time dis-tributed-order dericative.Then the finite element fully discrete scheme is obtained.The stability and error estimates for two func-tions u and v are derived.Some numerical examples are provided to indicate the efficiency of our schemes.
关键词
时间分布阶反应扩散耦合系统/二阶θ格式/稳定性/误差估计/数值模拟Key words
Time distributed-order coupled sub-diffusion system/Second-order θ scheme/Stability/Error estimates/Numerical simulation引用本文复制引用
出版年
2024