期刊
AIN SHAMS ENGINEERING JOURNAL
卷 12, 期 4, 页码 4081-4089出版社
ELSEVIER
DOI: 10.1016/j.asej.2021.04.005
关键词
Bernstein collocation method; RLW equation; MRLW equation; Kronecker product; Partial differential equations
The RLW and MRLW equations are numerically solved using Bernstein polynomials in both space and time directions based on Kronecker product. A new Bernstein collocation method is applied and convergence study is conducted. Conservation properties and accuracy testing are also investigated in this study.
The regularized and the modified regularized long wave (RLW and MRLW) equations are solved numerically by the Bernstein polynomials in both the space and time directions based on Kronecker product. In this paper, we applied a fully different Bernstein collocation method than the other methods which used Bernstein polynomials to solve the problems. The approximate solution is defined by the Bernstein polynomials in all directions. A general form for any m derivative of any Bernstein polynomials is constructed. A general matrix form for the vector of any m derivative of any Bernstein polynomials is also constructed. Convergence study for the proposed numerical scheme is investigated. To determine the conservation properties of the RLW and MRLW equations, three invariants of motion (I-1, I-2 and I-3) are computed. To test the accuracy, two error norms (parallel to E parallel to(2) and parallel to E parallel to(infinity)) are evaluated. Numerical outcomes and comparisons with other techniques for the single and the interaction of two solitary waves for RLW and MRLW equations are presented. (C) 2021 THE AUTHOR. Published by Elsevier BV on behalf of Faculty of Engineering, Ain Shams University.
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