High-Order Iterative Scheme for a Viscoelastic Wave Equation and Numerical Results

• Main Authors: Doan Thi Nhu Quynh, Bui Duc Nam, Le Thi Mai Thanh, Tran Trinh Manh Dung, Nguyen Huu Nhan
• Format: Article
• Language: English
• Published: Hindawi Limited 2021-01-01
• Series: Mathematical Problems in Engineering
• Online Access: http://dx.doi.org/10.1155/2021/9917271

In this paper, we consider a Robin problem for a viscoelastic wave equation. First, by the high-order iterative method coupled with the Galerkin method, the existence of a recurrent sequence via an N-order iterative scheme is established, and then the N-order convergent rate of the obtained sequence to the unique weak solution of the proposed model is also proved. Next, with N=2, a numerical algorithm given by the finite-difference method is constructed to approximate the solution via the 2-order iterative scheme. Moreover, the same algorithm for the single-iterative scheme generated by the 2-order iterative scheme is also considered. Finally, comparison with errors of the numerical solutions obtained by the single-iterative scheme and the 2-order iterative scheme shows that the convergent rate of the 2-order iterative scheme is faster than that of the single-iterative scheme.